In a striking turn of events, the Australian Open has put a halt to matches held on outdoor courts due to the extreme heat enveloping Melbourne. This decision came after the tournament’s Heat Stress Scale (HSS) indicated conditions so severe that it necessitated closing the roofs of the three largest stadiums, resulting in a complete stoppage for all outdoor games.
One player who greatly benefited from this suspension was Jannik Sinner, the world’s second-ranked player and reigning champion. During his match against Elliot Spizzirri, Sinner found himself in a tough spot, suffering from severe cramping while trailing 3-1 in the third set. Just as he struggled to serve or move effectively, the HSS reached a critical level of 5.0. According to the tournament's regulations, play is paused when an even number of games have been completed, or at the end of a tiebreak, which played a crucial role in his case.
The Heat Stress Scale evaluates four primary environmental factors: air temperature, radiant heat from the sun, humidity levels, and wind speed. These elements are essential as they directly impact a player's capacity to regulate their body temperature effectively during matches.
Meanwhile, on John Cain Arena, the match between Lorenzo Musetti and Tomas Macháč was interrupted while Musetti was ahead 2-0 in the fifth set. Additionally, Linda Nosková’s contest on Kia Arena was also paused, given that this particular venue lacks a roof to provide shelter from the harsh elements. At the moment of the suspension, there were no ongoing matches on Margaret Court Arena.
The tournament organizers later announced that outdoor matches would not continue until at least 5:30 p.m. local time, which corresponds to 01:30 a.m. ET. With temperatures expected to soar near 100 degrees Fahrenheit (approximately 38 degrees Celsius) during midday, the tournament adjusted its schedule to start play earlier than usual—10:30 a.m. on the main show courts and 10:00 a.m. for outdoor matches. This strategic change allowed for one match to be moved from Kia Arena to Margaret Court Arena, maximizing playtime in shaded areas and ensuring player safety.
James Hansen, a Senior Editor at The Athletic, specializes in covering tennis. Before joining The Athletic in 2024, he dedicated nearly five years as an editor at Vox Media in London. A former player at Cambridge University, where he engaged in college tennis (not affiliated with the American circuit), he now serves as a team captain at Ealing Tennis Club in west London. You can follow James on Twitter @jameskhansen.
