Manchester United have completed a deadline deal for defender Alex Telles from Porto, the club announced on Monday.

Telles, 27, has put pen to paper on a four-year contract at Old Trafford.

- Stream FC Daily on ESPN+
- Deadline Day LIVE: All the rumours and done deals

Sources told ESPN on Sunday that United had agreed a fee around €15 million with Porto for Telles ahead of Monday's transfer deadline.

Telles will now join up with the Brazil national team and could make his debut away at Newcastle United on Oct. 17.

The defender ends his four-year spell with Porto where he won two league titles and scored 21 goals in 127 appearances for the club.

United have struggled defensively this season, conceding 11 goals in three Premier League games including the 6-1 defeat at the hands of Jose Mourinho's Tottenham.

Telles becomes United's latest arrival this summer after signing Donny van de Beek from Ajax.