Roger Federers coach has opened up on when the tennis legend plans to retire.
Federer is considered one of the greatest players to ever pick up a racquet and has won 20 Grand Slam titles during his remarkable career.
The 37-year-old won his sixth Australian Open title at the start of the year but has since suffered a number of disappointing defeats.
He was beaten at Wimbledon by outsider Kevin Anderson, before losing to John Millman in the last-16 stage of the US Open.
The defeats have led to speculation over Federers longevity in the sport and his coach, Severin Luthi, admits he could retire next year.
Luthi told Le Temps: Roger does not talk much about his retirement and does not like to talk about it, because its like it makes it come faster.
I can see him playing between one and three years [more].
For the Davis Cup, its different, my contract ends in late 2018. Then I will think about what I want for me.
Swiss legend Federer is currently competing at the Paris Masters, aiming to win his 100th ATP Tour title.
Rafael Nadal was forced to withdraw from the tournament, meaning Novak Djokovic will reclaim the world No. 1 spot when the rankings are released on Monday.