Dimitar Berbatov's days at Old Trafford may be coming to an end this summer. Reuters

The agent of Manchester United striker Dimitar Berbatov has revealed he has no further information in regards to the Bulgarian's future.

The Manchester United striker is free to negotiate with other clubs next month because Sir Alex Ferguson is yet to take up the option of a one-year extension. The clause is a one-way deal until the end of the season, meaning the Red Devils can decide to prolong the 30-year-old's career for a further year if and when they deem it necessary.

Despite the fragile Manchester United future of Berbatov his agent, Emil Dantchev, claims thus far Sir Alex Ferguson has given him no indication of the club's intention.

Berbatov, who turns 31 next month, has been linked with a number of clubs most notably with Fulham, Tottenham and Juventus, but his agent suggests there is little to clarify given Manchester United's lack of decision thus far.

"I do not like commenting on the rumours, but I can tell you that I never had any contact with Juventus nor Napoli," Emil Dantchev told Italian publication Calciomercato when discussing speculation regarding the Manchester United star.

He added: "A sale in January? I have not spoken with Manchester United about this possibility, so I cannot tell you if this track is viable or not.

"Does he like the Italian league? Of course, like all major European leagues, English, German, Spanish and French, but that means nothing."

Manchester United's record signing scored during the 5-0 victory over Fulham last night but has played a peripheral role at Old Trafford this season.