Dimitar Berbatov's agent Emil Dantchev has told BBC Sport the striker is happy at Tottenham but would be interested in a move to "a big club".
The 26-year-old has been a huge hit since joining Spurs in 2006, but Dantchev said he had spoken to chairman Daniel Levy about his future.
"Dimitar wants to fulfil his potential and win trophies now," said Dantchev.
But Levy has repeatedly insisted he is building for the long term, rather than being interested in selling players.
The Bulgarian has regularly been linked with Manchester United and his agent's comments came just before the mid-season transfer window opens.
He scored 22 goals in his first season at White Hart Lane, and so far this campaign he has netted another 11, including four in the 6-4 win over Reading.

The 26-year-old has been a huge hit since joining Spurs in 2006, but Dantchev said he had spoken to chairman Daniel Levy about his future.
"Dimitar wants to fulfil his potential and win trophies now," said Dantchev.
But Levy has repeatedly insisted he is building for the long term, rather than being interested in selling players.
The Bulgarian has regularly been linked with Manchester United and his agent's comments came just before the mid-season transfer window opens.
He scored 22 goals in his first season at White Hart Lane, and so far this campaign he has netted another 11, including four in the 6-4 win over Reading.
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