West Ham and France midfielder Dimitri Payet would command a "ridiculous" transfer fee if another club wanted to sign him in the summer, according to his agent.
Payet, 29, had an excellent debut season in the Premier League, netting nine goals in 30 league appearances for the Hammers.
He also starred for France in their Euro 2016 opener against Romania, setting up a goal for Olivier Giroud before netting a sensational late winner.
Chelsea, Manchester City and Paris Saint-Germain have all been linked with the midfielder, who joined West Ham from Olympique Marseille last summer.
"As far as I am concerned, he's been happy at West Ham and it's down to West Ham that he's in the position that he is in," Payet's agent Mark McKay told Sky Sports.
"He's doing great now for France and to get him now, you've got to be talking ridiculous money. But football is football, so you never know.
"When he first came last year, we hoped for the best with him. We knew that he was a really good player, but I don't think anyone could really expect what he has gone on to do in the Premier League so far," he continued.
"The game against Romania the other night was a joy to watch."
New Chelsea manager Antonio Conte and new City boss Pep Guardiola are both reported to be admirers of the 29-year-old, as they look to build title-winning squads at their respective clubs.
West Ham awarded Payet an improved six-year contract – worth £125,000-per-week – midway through the season to ward off interest from other clubs.
The midfielder is expected to start for France in their second Group A clash against Albania on 15 June.