Roger Federer may not have swung a racquet in a competitive match for more than a year, but the Swiss maestro is still very much the king of the tennis world.
The 41-year-old has retained his place at the top of the list of the world's highest-paid tennis players for an astonishing 17th year.
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That is despite the fact the 20-time major winner has not featured on the ATP Tour for nearly 14 months.
Federer has not played since being beaten in last year's Wimbledon quarter-finals to Hubert Hurkacz, a straight-sets defeat that culminated in a 0-6 third set.
Following the chastening defeat, Federer had another operation on his troublesome knee, which has bothered the Swiss great in the twilight of his career.
However, the Swiss ace still raked in an estimated $US90 million ($A129 million) before taxes and agents' fees over the last 12 months.
It puts him on the top of the tennis rich list, with the money coming from "endorsements, appearances and other business endeavours".
Japan's Naomi Osaka, who has won four majors, is second on the list after making around $US56.2 million ($A80.6 million) in the past year.
The 24-year-old launched a new media company in partnership with four-times NBA champion LeBron James and a new sports agency in June.
She is the highest-paid female tennis player, earning more than 23-times grand slam winner Serena Williams, who is set to retire after the US Open that begins next week.
Williams has earned $US35.1 million ($A50.4 million) this year, edging former men's No.1s Rafael Nadal ($US31.4 million) ($A45.0 million) and Novak Djokovic ($US27.1 million) ($A38.9 million).
US Open champion Emma Raducanu made her debut on the list after she shot to stardom last year when she became the first qualifier in the Open Era to capture a grand slam title.
The British teenager is sixth on the list with $US21.1 million ($A30.3 million) while men's US Open champion and world No.1 Daniil Medvedev is seventh with $US19.3 million ($A27.7 million).
Kei Nishikori ($US13.2 million) ($A18.9 million) and Venus Williams ($US12 million) ($A17 million) are eighth and ninth while Spanish sensation Carlos Alcaraz ($US10.9 million) ($A15.6 million) rounds off the top 10.
Roger Federer's ATP Tour return 'definitely' on the cards
Earlier this year, Federer revealed that a return to the ATP Tour is still "definitely" on the cards, but it might not be until 2023.
The 20-time grand slam winner recently turned 41, and has barely featured on the ATP Tour in the last two years due to knee trouble that has required multiple surgeries.
Having watched Rafa Nadal win the French Open to claim his 22nd grand slam title, Federer spoke afterwards about his highly anticipated return to the court.
While Federer isn't confident that he will play more than the Laver Cup and in Basel this year, he said he "definitely" wants to return for a 2023 push.
"How and where, I don't know yet. But that would be the idea," Federer said at the time.
"I haven't planned more than the Laver Cup and Basel yet. After Basel, the season is over anyway. It's important for me to get fit again so that I can train fully.
"Once I've done that, I can choose how many tournaments I play and where.
"The Laver Cup is a good start, I don't have to play five matches in six days. I will have be able to do that in Basel. That's what I have to prepare for it in practice.
"I'm curious myself what's still to come.
"But I'm hopeful, I've come a long way. I'm not far away."
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