Roger Federer says he is still to decide whether he will play at the Olympics next year in Tokyo.
Current rules state players must play a Davis Cup or Fed Cup match within the four-year Olympic cycle and at least once in 2019 or 2020 to be eligible.
But Federer has not played a Davis Cup match since 2015 and has shown little willingness to return to the team competition.
The event has undergone a major overhaul and is now a week-long World Cup-style tournament.
And this year it will take place from November 18-24, straight after the ATP Finals, which Federer has qualified for.
Should Federer decide to play in Tokyo, he could seek an exemption which can be issued for players who don’t meet the requirements.
Federer is yet to decide his schedule for 2020 with the Olympics coming not long after Wimbledon and a few weeks before the US Open.
An Olympic gold medal in the singles is one of the few accolades missing from Federer’s glittering career with a 2012 final defeat to Andy Murray at Wimbledon and pulling out in 2016 with a knee injury.
But he does have a gold medal in the men’s doubles with Stan Wawrinka from the 2008 Beijing Olympics.
After his fourth-round win over David Goffin, Federer was asked for an update about his plans but the Swiss was unable to say what he will do.
He said: “I don’t know if I’m going to be playing there just because it’s still a year away.
“Even though the time is slowly coming around for me, in my mind, my team, my family, to find out what’s the best schedule after Wimbledon next year.
“Then I for sure meant also I don’t know exactly the requirements, what it takes with wildcards at the Olympics, all that stuff, as the Davis Cup format also changed, all that stuff.
“As I don’t know if I will be playing, I don’t know the requirements, it was hard to give a proper answer. But needless to say, the Olympics, the ones I played, have always been very memorable, either with carrying the flag, meeting my wife in 2000, winning gold, winning silver.
“Naturally it’s always going to be a possibility for me to play Tokyo if there is an exemption.
“I don’t know if I’m actually going to do it or not because it all depends on family, on scheduling, on body, on future. I don’t know. We’ll see.”