London: The ATP Board has approved the introduction of a new heat rule that will 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, according to the ATP Tour’s official website.

According to Azerbaijan State News Agency, the new regulation is based on the Wet Bulb Globe Temperature (WBGT) and introduces clear thresholds for cooling measures and suspension of play in best-of-three singles matches. The rule’s key provisions include a 10-minute cooling break, which will be implemented when the WBGT reaches 30.1°C or higher during the first two sets of best-of-three singles matches. When activated, a 10-minute cooling break after the second set may be requested by either player and will apply to both players in singles.

During the break, players may utilise cooling measures, hydrate, change clothing, shower, and receive coaching, under the supervision of ATP medical staff. Play will be suspended when the WBGT exceeds 32.2°C. The new heat rule provides a structured, medically supported approach to managing extreme heat, with the objective of safeguarding player health, while also improving conditions for spectators, officials, ball persons, and tournament staff.