Mark van Bommel cannot rule out leaving Bayern Munich this month.
The Holland midfielder is off contract in June and been linked with Tottenham and Manchester City.
"I cannot say for definite that I will be staying at Bayern," he said.
"The transfer window is open until January 31 and we will just have to wait and see. My phone will be switched on while I am in Qatar."
Bayern will train in Qatar for the next seven days before returning to Germany in preparation for their first Bundesliga match of 2011 at Wolfsburg on January 15.
