ATP tour
New heat rule in effect from 2026
Learn the key provisions of the new rule
December 15, 2025
By ATP staff
The ATP Board of Directors has approved the introduction of a new heat rule to come into effect from the 2026 season, aligning the ATP’s approach with that of the WTA and strengthening protections for players competing in extreme conditions.
The new regulation is based on the Wet Bulb Globe Temperature (WBGT) and introduces clear thresholds for cooling measures and stoppage of play in best-of-three singles matches.
Key provisions
10 minute cool down break
Cooling measures will be taken when the WBGT reaches 30.1°C or higher during the first two sets of best-of-three singles matches. If enabled, a 10-minute cool-down break after the second set can be requested by either player. This applies to both players in singles.
During the break, players can use cooling measures, hydrate, change clothes, shower and receive coaching, under the supervision of ATP medical staff.
Suspension of the game
Play is paused when the WBGT exceeds 32.2°C.
Player health and safety
The new heat rule provides a structured, medically supported approach to managing extreme heat, with the aim of protecting player health while improving conditions for spectators, officials, ball staff and tournament staff.
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