The ATP Tour will implement a new heat policy from 2026 following a series of retirements due to extreme temperatures and humidity at the Shanghai Masters earlier this season.
The rule, based on the internationally recognized Wet Bulb Globe Temperature (WBGT) index, will set clear thresholds for cooling measures and match suspensions to protect player health.
The ATP said the policy aims to improve conditions not only for players but also for fans, officials, and staff.
Under the new regulations, if the WBGT reaches 30.1°C (86.18°F) or higher during the first two sets of a best-of-three singles match, a 10-minute cooling break can be requested by either player, applying to both competitors.
During breaks, players can hydrate, change clothes, shower, and receive coaching under medical supervision. Play will be suspended if the WBGT exceeds 32.2°C.
The policy follows several high-profile incidents, including Jannik Sinner’s retirement in Shanghai due to cramping and Novak Djokovic’s vomiting episode in extreme heat.
Earlier this year, Arthur Rinderknech collapsed on court during the Cincinnati Open, prompting calls for a formal heat policy.
The new rule aligns the ATP with the WTA and major Grand Slam regulations, with other professional sports, including soccer and Formula One, also adopting similar policies.
