Wawrinka, a three-time major champion who beat Rafael Nadal and Novak Djokovic in Grand Slam finals, ended his career with a first-round loss in Basel.

Elena Rybakina secured the season-ending top ranking on the WTA Tour as her Tokyo run continued.

Alexander Zverev will top the ATP rankings for the first time when the next list is published.

Naomi Osaka, a four-time major winner, lost in the round of 16 to Slovakian teenager Mia Pohankova in front of her home crowd.

Novak Djokovic fell in a third-set tiebreak to 47th-ranked Jan-Lennard Struff in Basel, leaving him one career title short of Roger Federer's record.

The coach's pick rekindled debate about how to weigh Grand Slam titles against ranking points, drawing fan comparisons to other sports awards.

Alex Eala advanced to the Tokyo quarters and set up a rematch with Diana Schnaider.

Canada's Leylah Fernandez survived a Mertens rally to move into the next round in Tokyo.

With the year-end No. 1 secured, Kazakhstan's federation outlined its ambitions for Rybakina's coming seasons.

Players and pundits sent messages after the Swiss champion played his final match in Basel.

TicketNews flagged on-sale availability for the season's final Grand Slam in New York.

A retrospective profile tied to Wawrinka's retirement and the opponent who ended his final major tournament run.

The Canadian Olympic Committee profiled the former US Open champion.

A look back at the man who topped the first ATP rankings and won seven major titles.