World number three Roger Federer is playing as well as ever and does not plan to slow down in his advancing years after overcoming fellow Swiss Stan Wawrinka to reach the showpiece of the ATP World Tour Finals.
Federer beat Wawrinka 7-5 6-3 in London on Saturday to set up a rematch with world number one Novak Djokovic in his quest for a seventh title at the season-ending tournament.
After coming from a break down in the opening set, the 34-year-old Federer was a class above his countryman at the O2 Arena as he served out the match to love.
Federer is set to contest his 11th final of the year on Sunday and the 17-time grand slam winner was asked about his thoughts of playing into his 40's.
While the idea of competing on the ATP circuit for at least another six years does not exactly appeal to Federer, he has no plans of retiring any time soon.
"If you manage your schedule, you can do that, play five tournaments a year, keep your ranking up, that's what you want to do," Federer told reporters.
"I haven't set myself any goals like that. Just happy things are working out well right now, that my team is as strong as it is behind me who make it possible for me to step out on court with a good mindset, that I enjoy myself, that my family is willing to travel with me, that we love it on the tour. It's not all that normal because a lot of work goes into that.
Federer and Djokovic will lock horns again on Sunday after the former emerged victorious during the round-robin phase.
A straight-set win saw Federer end Djokovic's 23-match winning streak.
Federer knows both players will be using that encounter as motivation for various reasons.
He added: "It matters because we can both look back on it and see what we could have done differently, for the good or the bad. That's interesting for both of us.
"Even though it does also happen that you play each other in one place one week, then another place seven days later in a finals, I'm sure we've done that as well. This is different. It's the same conditions, same court, same place.
"For me it's an advantage because I guess it gives me a bit of confidence. For him it's an advantage because he gets a second chance, and he's in another final. He's played some great tennis since we've played.
"I still believe his confidence is slightly higher than mine with the amount of success he's had this year."