Celtic defender Mikael Lustig hopes a long-awaited hip operation last year will help extend his career well into his 30s.
The Sweden international returned after four months out as a second-half substitute in the champions' 6-0 Premiership win over Inverness at Parkhead on Sunday.
And the 27-year-old, whose contract expires at the end of next season, is optimistic about his future and hopes to extend his stay at the club.
"I feel fine," he said. "I have been out for four months so there will be a little bit of stiffness but it will get better and better.
"I spoke to the doctor in Sweden after the 2012 Euros and he said if I wanted to play football when I was 33 or 34 then I needed to do it.
"There were a lot of games that I struggled to finish so hopefully that will be the end of that as well.
"It has been hard. I have never been out for more than two or three weeks before so four months is a long time.
"But we went out of the World Cup (qualifiers) with Sweden, the Champions League was over and it was winter, so the timing was quite good and the boys were playing well with good results so that made it easier.
"It will be great if I can get one or two games more then after taking a vacation I will be 100 per cent fit for next season."
Lustig, who signed from Norwegian side Rosenborg in 2011, expects to stay at Celtic beyond next season.
"Yes, I really enjoy being here so yes. We have started talking so we will see what happens."