Serbia winger Zoran Tosic has failed to agree on a contract with Manchester United, but said he remains optimistic he will join the club in January.

The 21-year-old Partizan Belgrade player visited Old Trafford last week with his manager, but said Sunday that United’s offer “does not coincide with” his demands.

“We agreed to stay in touch and I believe that everything will be fine in the end,” he said.

Tosic’s manager Zoran Pavlovic said the player was unhappy with the salary he is being offered, and told Belgrade daily Blic that the winger might consider finding another club.

No details of the transfer fee has been given for Tosic, but local media said it was around €3.5 million ($4.5 million.)

Tosic was granted a British work permit last month, after United manager Alex Ferguson made a personal plea at a hearing in Sheffield.

Tosic has made 12 international appearances, including at the Beijing Olympics, and can play on either flank.