The heat rule applies to all matches in singles competitions, even if they have already started when the WBGT surpasses 30.1C. Only one player needs to request the permitted 10-minute break for it to be enforced.
For best-of-five-set matches – in the men’s singles – the 10-minute break will be taken at the end of the third set. In best-of-three-set matches, this is taken at the end of the second set.
During breaks, players are allowed to leave the court but are not permitted to receive coaching or medical treatment.
WBGT readings at Wimbledon are measured 30 minutes prior to the start of play, at 14:00 BST and at 17:00 BST.
Where a match is carried over to the following day with the heat rule in place, it will not apply to a best-of-three-set match that has completed one set. It will also not be applied to any best-of-five-set matches that have completed two sets.
Should there be a match in progress during which the heat rule is lifted, it will remain in place until completion of that match.
