The 24-year-old, who was heavily linked with a move to Manchester United during the January transfer window, has 18 months left to run on his current deal at the Allianz Arena.
However, despite having stressed that he is "very happy to play for Bayern", the midfielder conceded that he still has not committed his future to the club.
"Much has been written, especially in the last few days, about my sporting future, but you shouldn't believe everything in some newspapers," he wrote on his official Twitter page. "The fact is I am very happy to play for Bayern and my position in the team is very good. The fact is also that we couldn't agree a new contract.
"Since it runs until 2015 this is not a big problem, and we will see what the future brings. My focus is on the sport side of things and we will do everything possible to complete the season as successfully as last season."
The likes of Manchester City, Arsenal and Liverpool are also said to be keen on the German international.