Felix Auger-Aliassime and Frances Tiafoe came up clutch Sunday in London.

The newly turned 40-year-old has also been dipping her toes into coaching... youth soccer coaching, that is.

Can anyone say they’ve had a more memorable birthday weekend than the American?

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.

The Swiss’ final practice session was a standing room only affair, and featured an appearance from self-proclaimed Federer "groupie” Anna Wintour.

The Roland Garros and US Open runner-up opened play with a win for Team Europe, defeating Jack Sock with a little mentoring from Rafael Nadal.

Before the most decorated Laver Cup field takes the court on Friday, the legendary quartet hit The O2 for one  unforgettable practice session.

Nothing beats good company, as evidenced by the scene Wednesday night for the event's "iconic" photo op.

The game’s greatest rivals found themselves on the same side of the court for the inaugural team competition at the O2 Arena in Prague.

The 20-time Grand Slam champion also recalled his practice session with Alcaraz at Wimbledon—and why it was memorable for more than just a chance to get an early look at the future world No. 1.