Carlos Tevez

Kia Joorabchian, Carlos Tevez's adviser, has admitted the Manchester United forward may have to move on from Old Trafford and has refused to rule out a move to Manchester City.

Joorabchian said that a contract offer from United has not been forthcoming and that Tevez will listen to offers from clubs who show the requisite ambition.

"There's a lot of interest but Carlos has always been very focused," Joorabchian told Sky Sports. "He wants to do the best he can. He will work his socks off and perform to the highest level until the end of the season."

Joorabchian would not be drawn on the list of clubs linked with the player — ranging from Manchester City to Liverpool to Milan — but did concede that "his preference is to stay in England". He said that Champions League football is not a deal-breaker, but that any potential club had to show "ambition, focus and want to be champions of England and champions of Europe".

"I don't want to direct, saying it's going to be Liverpool, City, Chelsea, Arsenal, Everton, Tottenham – whoever you can pick out – Milan, Real Madrid, Barcelona, Juventus," he said. "The key is that at the present moment Carlos is a United player and he's focused on being a United player for the rest of the season."

Tevez's agent, Adrian Ruocco, has expressed his surprise at United's failure to offer his player a long-term deal.

"There was no will from the directors and the coach [Sir Alex Ferguson] to sign a new contract," he said. "On 31 May, he will have no club and no contract. I don't know why, but Manchester United have not asked for any renewal [of the loan] nor signing him for next season.

"The directors and the coach do not seem to want him, while on the other hand fans love him."