0238 GMT February 21, 2018
At 36 years old, Federer is facing further questions about when he will call it a day on his illustrious career, Sunday Express reported.
Prior to 2017 he hadn't won a major in four years, his last coming at Wimbledon in 2012.
Injury setbacks and a drop in form coupled with Novak Djokovic and Andy Murray's rise in the game looked as though he would be unlikely to add to his 17 Grand Slams.
But he shocked everybody, including himself, by clinching the Australian Open earlier this year before winning his eighth Wimbledon title and finishing the season as world No. 2, only just behind Rafael Nadal.
He couldn't quite finish the year on a high, crashing out of the ATP Tour Finals in London last month.
The tennis legend has won everything there is available in the sport, including the Davis Cup trophy with Switzerland back in 2014.
But he has played just one tie for his country since then and will need to feature in another three to be eligible to compete at the 2020 Tokyo Olympics.
And Federer has suggested he has no plans to play in the Davis Cup against anytime soon meaning tennis fans may not see him in action at an Olympics ever again.
"I haven't officially retired from the Davis Cup," Federer said.
"It's just because it's always highly unlikely that I'll play at this stage of my career.
"You know, I haven't set Tokyo Olympics as a goal either.
"It hurt not being in Rio, but I was okay without it, too. I was flag bearer twice.
"I won gold. I won silver. I feel like I achieved a lot of great things at the Olympics.
"I'm not thinking that far ahead."