Novak Djokovic and Jannik Sinner both required medical attention in their most recent matches after struggling physically on court. Their timeouts threw off their opponents.

First came the medical timeouts, one each for Jannik Sinner and Holger Rune with the temperature above 90 degrees Fahrenheit (32 Celsius) at the Australian Open. Then came the unusual sight of a 20-minute delay because the net at Rod Laver Arena detached from the court after being hit by a big Sinner serve.

Novak Djokovic’s high-handed decision to boycott ... Playing Denmark’s Holger Rune, Djokovic seemed determined to misinterpret the Centre Court crowd’s light-hearted shouts of “Ruuuune ...