Germany international Michael Ballack is unsure whether he will still be a Chelsea player next season.
The 33-year-old's Stamford Bridge contract expires at the end of the current campaign but he is becoming increasingly frustrated by the lack of silverware he has accrued since joining the Blues in 2006.
He has won two FA Cup winners' medals as well as one League Cup success but Premier League and Champions League trophies have alluded him.
"What is important for me is winning titles and that's why I also want to play in a team that is hungry for success," Ballack told the Evening Standard.
"I signed an extension just recently and I hope that I will continue to be successful in the future.
"Any discussions I have in the future, though, will be made after due consideration and I will discuss everything with the club and with my family.
"At my age you think in shorter time frames and I'm already playing for one of the best clubs in the world. I'm very much at home in London and I can imagine seeing out my career at Chelsea.
"It's very important for us this year to win the Premier League again after a three-year wait. We want to take England by storm but winning the Champions League is a big personal aim of mine."