Smith, target of constant heckling across the globe a few years ago for his role in the 2018 Newlands ball-tampering scandal, said that Hardik needed support from his team-mates at Mumbai Indians, including from Rohit Sharma, who Hardik replaced as captain ahead of IPL 2024 after a 11-year stint.

"I'd try and just say, to block it out, it's all irrelevant," Smith said on ESPNcricinfo's TimeOut show. "No one outside knows what you are going through. No one [from outside] is in that change room."

Smith was handed a year-long ban by Cricket Australia after admitting to "leadership failure" in the Newlands Test, and was also forced to "step down" as Rajasthan Royals captain in IPL 2018. He said he had treated the heckling he had experienced - including at the 2019 ODI World Cup in England where fans chanted "cheat" - as "white noise".

But can the abuse from fans, coupled with criticism of his captaincy in Mumbai Indians' back-to-back losses in IPL 2024 by pundits, impact Hardik adversely?

Smith suggested that Hardik might have been surprised at the reception because it is not often India's top players are booed by fans. It is not unprecedented, though, with Sunil Gavaskar, Sachin Tendulkar and Ravi Shastri being at the receiving end at various points in their careers.

"Personally, for me, it doesn't bother me. I don't care. I don't pay any attention," Smith said. "You know it's all white noise, but certainly players do hear things and everyone's entitled to their own emotions and how they respond to those.

"So is it affecting him [Hardik]? Maybe. It's possible. He probably hasn't experienced that before in, in any walk of life. So it's natural, I suppose, and particularly being in India and a star Indian player, to be in that position where some fans are booing you, it's certainly something he wouldn't have experienced."

In his first media briefing, responding to a query on whether he had spoken with his predecessor Rohit, Hardik was vague, triggering a critical response including vitriolic trolling on social media.

In 2017, Smith was installed as captain at Rising Pune Supergiant replacing MS Dhoni, who had then recently retired as India's white-ball captain. It was a challenging moment for Smith, but he said that Dhoni had supported him all the way.

"It was an enjoyable season and we had some success that year [2017], I suppose, which helped as well," he said. "But MS was great with everything that he did. He was supportive, he helped me in any way that he could. He was great behind the stumps, obviously. He's got a great view of what's going on in the game and the angles that sort of take place on the field, and was able to sort those out and get people in the right areas.

"Hardik is in the middle of a challenging time, losing the first two games their IPL season. It's a big one for him. He's filling big shoes with Rohit Sharma, who's been the most successful captain [with Dhoni] in IPL history, lifting five titles, and it hasn't started well for him.

"So he's under a little bit of pressure at the moment and it'll be interesting to see what the reception's like in their first home game at Wankhede in a couple of days' time. We have heard a few boos going around at the grounds, which that's been disappointing from my aspect. But I'm intrigued to see what the reception's like in Mumbai. We know how big a star Rohit is and how much he is loved inside that stadium."

'Hardik's made a few tactical errors'

Outside of the noise, Smith said that Hardik had erred tactically against Titans as well as against SRH.

"I'm sure he is going to learn from that. As a captain, you have to have plans in place for the start of the game. And clearly the plan was to bowl Bumrah straight up to Heinrich Klassen. But you've got to shift your plans when things aren't going well. And it didn't look like they shifted. They sort of just kept doing the same thing. It was a bit of a blunder in his first outings."

"It was lovely, wasn't it? I remember that game and Virat - I walked past him and sort of gave a little fist bump, I think, from memory. It's nice when someone does something to you are in the middle of a game, you are playing against an opponent. I thought it was really nice gesture.

"Maybe someone can do something [similar for Hardik]. Maybe it's Rohit Sharma. Maybe he stands up and says, 'guys, what's going on, let's support this guy'. I don't know. That could happen, I suppose. Well, we'll wait and see."