The summer transfer window is into its final month for the major European leagues, which means the biggest clubs are looking to make a splash in the market before the new season begins. Check out the latest gossip below, and see all official deals here.

TOP STORY: Where to now for Ronaldo?

With sources confirming to ESPN that former Barcelona star Lionel Messi has agreed to join Paris Saint-Germain, AS are suggesting that fellow superstar Cristiano Ronaldo will be monitoring the situation for a very different reason.

The Portugal talisman has reportedly been looking to leave Juventus, with frustration over their unsatisfactory results in the Champions League playing a part in his unease.

PSG are said to be one of the only clubs capable of signing the 36-year-old, but bringing in Messi would make any move for Ronaldo unfeasible even if there is no transfer fee to be paid.

There has also been talk of Kylian Mbappe joining Real Madrid, but it is believed that even moving the 22-year-old on for a huge transfer fee would not be enough to help get Ronaldo to the Parc des Princes.

So, while the idea of Ronaldo and Messi playing in the same team is enough to get pretty much any football fan excited, it seems as though there is no chance of that happening.

This makes things very complicated for Ronaldo as he plots his route out of Turin.

- Stream ESPN FC Daily on ESPN+ (U.S. only)
- ESPN+ viewers' guide: LaLiga, Bundesliga, MLS, FA Cup, more (U.S.)
- Don't have ESPN? Get instant access

LIVE BLOG

17.07 BST: Lautaro Martinez was linked with a €71m move to Tottenham at the weekend; could he be the man to provide goals for Spurs, should Harry Kane Man City move happen?

16.32 BST: Southampton hope to bring in Liverpool midfielder Alex Oxlade-Chamberlain on loan, 10 years after he left the club, according to The Sun.

Oxlade-Chamberlain left St Mary's in 2011 as a 17-year-old, joining Arsenal for a £15m transfer fee. The England international then moved to Anfield in a £35m four years ago, but his time there has been plagued with long-term injuries.

Southampton now plan to re-sign the 27-year-old with an option to make the deal permanent, just as they did last season with another former youth star, Theo Walcott.

15.58 BST: A Barcelona member has filed complaints with a French court and with the European Union Commission with the aim of blocking any move by Lionel Messi to Paris Saint-Germain, according to documents seen by Reuters on Monday.

In the complaints, shared by the fan's lawyer Juan Branco, the Barca member claims that French football authorities have failed to enforce their own financial fair play (FFP) rules in order to help PSG become a force in European football.

Barcelona, like its main LaLiga rival Real Madrid, is fully owned by its subscription-paying members known as socios.

The FFP rules notably forbid top European clubs from paying their playing squads an excessive share of their total revenues, according to the member's complaints, which also state that the transfer of the 34-year-old to PSG would breach the code.

PSG, the Ligue de Football Professionnel and the EU Commission didn't immediately reply to requests seeking comment.

15.13 BST: Tottenham manager Nuno Espirito Santo says he plans to talk with striker Harry Kane about his future on Monday.

Kane, who is a target for Manchester City and told the club he wants to leave this summer, was absent as he continues to isolate at the club's training ground hotel after returning for preseason on Saturday.

Nuno said after Sunday's 1-0 win over Arsenal in a preseason friendly: "Harry is with us... I will speak with Harry probably as soon as possible because he is already at [Spurs' training ground where he is isolating]. Not today, today was the day of the match but we have a training session [on Monday] and with social distancing I will hopefully speak with Harry."

14.42 BST: Ilaix Moriba's future at Barcelona remains up in the air and RB Leipizig wants to bring him to the Bundesliga, sources have told ESPN's Moises Llorens.

The 18-year-old midfielder had an impressive breakthrough in Barcelona's first team last season but his contract ends next summer and he has turned down different offers to renew. Barca are beginning to accept that his future is away from the Camp Nou and sources have admitted that they are considering a transfer if a team offers between €15-20m to prevent him from leaving for free next summer.

Chelsea, who already tried his signing some years ago, are still monitoring the situation but different sources have revealed that Leipzig are the team that has shown the most interest in his signing in recent weeks. The Bundesliga team are always committed to the signings of young talent and see Ilaix's situation at Barcelona as a good opportunity. Barça would be willing to listen to offers for the midfielder but it remains to be seen if Leipzig agree to pay a fee for his services this summer or if they wait one year to try to get him as a free agent. The third possible scenario is that Ilaix backs down and agrees to renew his contract with Barcelona but sources from the Catalan club say that this possibility is increasingly unlikely.

Yet club president Joan Laporta already warned last week that Barcelona were not going to accept the demands that the youngster is asking to renew.

"The Ilaix situation can't be repeated, a player developed by the club waiting for the final year of his deal to force the situation. He doesn't want to renew with the conditions offered by the club. We cannot accept that, so we must send a message. He's a great player but if he doesn't renew there are other solutions. I feel bad but the club comes first.

"I ask him and his people to reconsider and come to an agreement. We're not going to promote a player [by playing him this season] for him to move to another club for free [in 2022]. I don't understand why he doesn't recognise what Barca have done for him. Whoever wants to leave is free to do so -- with certain conditions, of course."

Ilaix has been sent to train with the B team and has not featured in any friendly matches for either the first team or the reserves in preseason. The youngster knows that Barca will be inflexible so he has three possibilities on the table until Aug. 31: accept the last offer from the Catalan club and recover a place in the first team again, stay in the stands until his contract ends next summer or bring one offer from another team that satisfies Barcelona.

13.58 BST: Bayern Munich sporting director Hasan Salihamidzic has confirmed that the club would look at signing Borussia Dortmund striker Erling Haaland if he was available for transfer.

Haaland's hat trick in Saturday's 3-0 win over Wehen Wiesbaden in the DFB Pokal took the 21-year-old's goal tally for Dortmund to 60 goals in 60 games since he joined them in January 2020.

The Norway international has been linked with interest with all of Europe's biggest clubs, and Bayern chief Salihamidzic says the Bundesliga champions would try to compete for his signature.

"This is a top player that the whole world probably wants," he told Sport 1. "Of course we look there. Otherwise we would be full amateurs."

13.15 BST: Barcelona coach Ronald Koeman has denied reports that Sergio Aguero wants to leave the club following the departure of Lionel Messi.

Aguero, 33, joined Barca as a free agent this month following the expiration of his contract with Manchester City. The Argentina forward, who was eager to play with Argentina teammate Messi at club level, did not make his Barca debut in Sunday's Gamper trophy after sustaining a calf injury in training which has ruled him out for up to 10 weeks.

"It's not true that Aguero wants to leave," Koeman told TV3. "He has signed a contract with Barca and he is very excited. It's a pity that he got injured on Sunday morning and could not play. It's a step back as he was training and can bring a lot to the team with his qualify up front."

12.49 BST: Raheem Sterling will re-open contract talks with Manchester City, according to The Sun. Sterling has two years left on his current deal at the Etihad.

The England international did not play as pivotal a role for City last season as he has done in previous years, but the club still won the Premier League title and the Carabao Cup, as well as reaching the Champions League final.

Sterling now faces a new threat to his place in the team following the arrival of Jack Grealish in a British-record £100m transfer.

The Sun reports that Arsenal and Tottenham have both been linked with interest in former Liverpool forward Sterling.

12.24 BST: Roma will try to sign Paris Saint-Germain striker Mauro Icardi if Edin Dzeko leaves to join Inter Milan, Gazzetta Dello Sport reports.

Dzeko has been strongly linked with a move to Serie A champions Inter to replace Romelu Lukaku, who is close to returning to Chelsea this summer.

If the Bosnian does leave, Roma will look to bring Icardi back to Italy. The Argentina international moved to PSG in 2019, initially on a season-long loan before sealing a €57m move the following year.

Argentina international Icardi has scored 20 goals in 41 Ligue 1 appearances for PSG, but he is likely to suffer from the expected arrival of Parc des Princes of Lionel Messi, who is set to take his place in a front three alongside Neymar and Kylian Mbappe.

11.45 BST: Real Madrid midfielder Toni Kroos says he would not be surprised if Kylian Mbappe joins his club in this transfer window.

Mbappe, a long-term target of Madrid, has not signed a new contract with Paris Saint-Germain with his current deal ending next summer. With Lionel Messi in line to strengthen PSG's attack this summer, there is increase speculation that Mbappe could leave the French giants this month and sign for Madrid.

Asked about the France forward, Kroos told Bild: "Mbappe? He is the most interesting player on the market, and he is not exactly cheap. I prefer to talk about transfers that have been completed but, as Real Madrid always want the best, it wouldn't surprise me."

Kroos, meanwhile, believes Madrid will need time to adapt to the departures of experienced centre-backs Sergio Ramos and Raphael Varane. Ramos joined PSG as a free agent while Varane moved to Manchester United for an initial €41m fee. Madrid strengthened their defensive line with Austrian defender David Alaba joining the team after his contract with Bayern Munich expired last month.

"We Ramos and Varane leaving we have lost our starting centre-backs of the last eight years," Kroos said. "Ramos played more than 600 games for Madrid and scored more than 100 goals and won 22 titles. If you want to replace those players of that level is expensive. Moreover, Real Madrid paid for (signing) Varane but has not paid for Alaba. We have to take that into account."

11.06 BST: Tottenham Hotspur target Lautaro Martinez (see 09.00 BST) has no intention of leaving Inter Milan this summer, according to his agent.

The Argentina forward has received offers from the Premier League and La Liga but is expected to sign a new deal with the Serie A champions to remain at the club beyond his current contract which expires in June 2023.

"Lautaro will remain at Inter," the player's agent, Alejandro Caamano, said. "He is happy in Italy. We have a good relationship with the club and he is calm. It's true that he has had offers but now we will sit down with Inter and talk about the future."

Arsenal and Atletico Madrid were also monitoring Martinez, who has scored 69 goals in 132 games in his three seasons at Inter.

10.33 BST: Bojan Krkic will reunite with former Barcelona teammate Andres Iniesta Vissel Kobe after signing for the Japanese club.

The 30-year-old memorably broke Lionel Messi's record as the youngest player to feature for Barca in a LaLiga match back in September 2007, after coming through the Spanish giants' famed La Masia academy.

Having scored 41 goals in 163 appearances at Camp Nou, Bojan also had spells in Serie A with Roma and AC Milan, as well as with Stoke in the Premier League, and was last on the books of Major League Soccer's CF Montreal.

But the once-capped Spain international, whose sole international appearance was back in 2008, will now link up once again with Iniesta, who has been playing for Vissel in the J1 League since parting ways with Barcelona three summers ago.

09.59 BST: Arsenal midfielder Joe Willock is set to join Newcastle in a deal worth up to £25m, sources have told ESPN's James Olley.

The 21-year-old enjoyed a successful loan spell at St James' Park last season, scoring in seven consecutive Premier League games, and he is keen on securing regular first-team football.

The Gunners need to raise funds to reshape their squad and have decided to accept Newcastle's offer for the England under-21 international who has made a total of 78 appearances for the club having come through their academy set-up.

A deal is yet to be finalised with personal terms now to be discussed but all parties expect Willock to move in the coming days.

Sources have told ESPN that Arsenal boss Mikel Arteta is keen on adding more creativity to his team with Leicester's James Maddison and Lyon's Houssem Aouar among those under consideration but needed to sell a midfielder first before pursuing a specific target.

09.21 BST: After bidding an emotional farewell to Barcelona on Sunday, Lionel Messi is expected to travel to Paris soon before completing a medical at Paris Saint-Germain in the coming days, sources have told ESPN's Julien Laurens.

The Argentina captain is set to sign a two-year deal with the option for a third season. He could be presented at an event at the Eiffel Tower in the coming days. Messi said he had received several calls from clubs since the news broke, confirming PSG's interest, and multiple sources have told ESPN that he has already agreed to sign for the Ligue 1 side.

The 34-year-old had agreed to a new five-year contract with Barca, but that would have meant the club's wage bill stood at 110% of their revenue. Their spending cap with LaLiga has dropped from over €600 million in 2019-20 to an expected €200m for the coming season, making it impossible to register Messi's new deal, even with a big pay cut. His previous terms included a base salary of around €70m gross without bonuses.

- The definitive timeline of Messi's Barcelona career

08.38 BST: Leicester City will look to cover for the absence of Wesley Fofana by signing Southampton defender Jannik Vestergaard, talkSPORT reports.

Fofana will undergo surgery on Monday that will keep him sidelined until next year after suffering a broken leg during a preseason friendly against Villarreal last Wednesday.

The centre-half was injured following a rash foul by Villarreal's Fer Nino, which Leicester manager Brendan Rodgers described as a "horrendous challenge" in the aftermath of the game against last season's Europa League winners.

That has led the Foxes to re-ignite their interest in Saints centre-back Vestergaard, who they first tried to sign last summer. The Denmark international could be available for around £15m, according to talkSPORT, as his contract at St Mary's is due to expire next summer.

08.00 BST: Tottenham are pushing to complete a move for Inter Milan striker Lautaro Martinez after indicating they are willing to meet the club's €71m valuation, sources have told ESPN's James Olley.

Spurs and Arsenal are among the clubs tracking Martinez in hope of securing a deal with Inter, who are under pressure to offload players as a result of financial losses arising from the coronavirus pandemic.

It is understood Spurs believe they have agreed a fee in principle but sources close to Inter have dismissed suggestions they are ready to sanction a transfer.

The situation has been complicated by Chelsea's pursuit of Romelu Lukaku. Inter have already seen Achraf Hakimi join Paris Saint-Germain and also agreed a fee of €115m with Chelsea for Lukaku.

PAPER GOSSIP (by Danny Lewis)

- Franck Ribery and Arjen Robben formed one of the most feared winger duos in modern times when they were at Bayern Munich. While the Dutch half has retired, Gazzetta dello Sport have suggested that Ribery could make a return to Bavaria as they look for back-up to Kingsley Coman after the veteran was rejected by Fiorentina. There haven't been any negotiations yet, but the 38-year-old is training with Bayern and could be a cost-effective option at a time where coronavirus has impacted funds.

- Manchester United want to recoup the £50 million they spent on Anthony Martial in 2015 if he leaves, reports the Express. Ole Gunnar Solskjaer has a plethora of attacking talent at his disposal and this could see the Frenchman depart as United look to offload players. Internazionale and Everton are both interested in the 25-year-old.

- AC Milan are hoping to sign a creative player and Calciomercato has offered a list of whom they're looking at. Atalanta's Josip Ilicic, Chelsea's Hakim Ziyech, CSKA Moscow's Nikola Vlasic, Real Madrid's Isco and Everton's James Rodriguez are the players named.

- Arsenal are still monitoring Martin Odegaard's situation at Real Madrid, according to Fabrizio Romano. The Norwegian has always been their main target to fill the No. 10 position, and the Gunners will bid if he and Los Blancos decide to part ways with the 22-year-old permanently.