LONDON—It was quite a collection of tennis luminaries sharing the black indoor hard court for a Laver Cup doubles practice session Thursday, 66 Grand Slam titles among them, a group collectively nicknamed the Big Four: Roger Federer and Rafael Nadal on one side of the net; Novak Djokovic and Andy Murray on the other.
(L–R) Britain's Andy Murray, Serbia's Novak Djokovic, Switzerland's Roger Federer, and Spain's Rafael Nadal attend a training session ahead of the Laver Cup tennis tournament at the O2 in London on Sept. 22, 2022. Kin Cheung/AP Photo
