Nemanja Vidic is determined to prove himself at Inter Milan.

The former Manchester United captain has struggled to settle since his summer arrival, though is now back in the first team of coach Roberto Mancini.

Vidic has been linked with a return to United this month, while interest from Russia has arrived.

But agent Silvano Martina insists Vidic is committed to the Nerazzurri.

"We will not accept any proposal, the guy will not leave Inter during the month of January," declared Martina.