Dimitar Berbatov has admitted his future at Manchester United is far from certain.
Berbatov retired from international football on Thursday in a bid to concentrate on club football at Old Trafford.
His decision came at the end of his second season with the Red Devils where he scored 14 goals but remains the subject of much debate among supporters.
The 29-year-old striker has yet to win over his doubters following a club record £30.75million move from Tottenham in summer 2008.
United are expected to sign at least one new striker this summer with Real Madrid's France international Karim Benzema believed to be their number one target and Berbabtov has admitted that has left him looking over his shoulder.
"I'm sure United will buy a new striker, but I am there and that's important," he said.
"In my two years, things could have been better but they could have been worse, too. I have had my moments.
"I have won the title and the Carling Cup but people had great expectations for the money it cost to sign me. We do not know what will happen in the third year.
"I will try to fulfil my contract because where would I go after United? I have reached the top with them.
"I do not know about interest from other clubs and I have had no meetings."