Laver Cup Live: Federer Loses Doubles Showdown to End Career

The last match of Roger Federer’s 24-year professional career was about to begin, and Andy Murray, one of his rivals turned teammates at this Laver Cup in London, kept his advice short and sweet.

“Enjoy it,” Murray said.

Federer took that to heart on Friday night: acknowledging the roars and support of the sellout crowd in the O2 Arena; smiling often and cracking jokes with his doubles partner Rafael Nadal as they lost to Frances Tiafoe and Jack Sock, 4-6, 7-6 (2), (11-9). The decider after the teams split sets was a 10-point tiebreaker rather than a third set.

The tone, as so often with Federer, seemed just right, but then that was partly by design. Even with a suspect right knee, he could…