Both world No. 1s were among a slew of current top players and tennis legends who took to social media to celebrate the 20-time Grand Slam champion.

A climate protester lit a portion of the court and his arm on fire during Stefanos Tsitsipas and Diego Schwartzman's match.

Come for Federer’s farewell and the Big 4’s final ride, stay for the generational clash as Team Europe and World converge for a fifth time.

“We knew it (a transition) would eventually come sooner or later, and it looks like it was later,” said John McEnroe.

Playing in his first hard court tournament since March, the Colombian won the first 11 games in a row and needed nine match points to oust the world No. 5 in four sets.

The Croat “started the week with not much confidence, to be honest,” and finished it with his first Masters 1000 title and wins over five seeded players.

Tsitsipas is coming off a huge win over Medvedev—and he'll need to channel that same energy against Coric.

After falling at the final-four hurdle the previous two years, the Greek cleared the world No. 1, 7-6 (6), 3-6, 6-3.

Keys has not dropped a set in four matches, including her upset of top-ranked Iga Swiatek in the round of 16 and Friday's quarterfinal win over Elena Rybakina.

Before he makes his long-awaited return to the courts at Laver Cup, the 20-time Grand Slam champ will help raise funds for two organizations patronized by the Duchess of Cambridge.