- Wimbledon recorded its hottest opening day at last year’s Championship and the heat could be a significant factor once again across the fortnight at the grand slam tournament.
- The tournament has a heat rule in place, allowing players to request a 10-minute break if the heat stress index reaches 30.1C or above.
- This break would be taken between the second and third sets for women's singles matches and between the third and fourth sets for men's matches, with measurements taken at specific times throughout the day.
- The heat rule was triggered during Wimbledon qualifying, coinciding with an extreme heat red weather warning in London.
- Other grand slams, such as the Australian and French Opens, also implement similar heat rules, with the French Open suspending play if the Wet Bulb Globe Temperature reaches 32C.
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