Remember back in 1976 (before CO2 overheated the planet), when Wimbledon temperatures were so cool that the tennis balls almost didn't burst?

Heatwave Britain - MetLink UK Weather and Climate Resources for Teachers, Schools and Students

Wimbledon has been known to take place during summer heatwaves; in the famously scorching summer of 1976, the tennis balls at Wimbledon burst with the heat causing them to expand! The temperatures peaked around 36C back then