It was 35.7 degrees on Wednesday at the Wimbledon grounds, the highest temperature ever recorded in the history of the tournament, and the players felt it including a ballboy who collapsed on court during John Isner's match against Matthew Ebden.

"It was a very scary situation," Isner told ESPN about the incident that happened on Court 17. "I have heard that he's doing much better, which is great. He just needs to rest up."

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Since the tournament started, there have been a number of spectators needing medical attention for dizziness, headaches and dehydration. Even the security staff were permitted to remove their ties but kept their hats on for protection.

One player needed treatment despite winning his match in straight sets. "I was very dizzy out there. I didn't sleep well yesterday and the day before. I was fatigued and starting to get dizzy out there with the heat hitting me," Australian Bernard Tomic told ABC after battling the heat in his 2^nd round match.

Tomic also questioned the heat rule that exempts male players from taking a break. Only women players whose matches reach the third set are allowed some rest according to the rule which was introduced in 1992. Since then, it has only been applied twice, mainly in 2006 and 2009, during the fortnight.

"It's a bit interesting how the women have a different rule applied to them with the heat," the Australian said. "I think ours is slightly different. I think we are allowed to play in more heat. Is it fair or not? Who am I to say? I don't know. It's a tough one."

To cope with the heat, players usually resort to ice baths after the match. While on court, they wrap their necks with iced towels during changeovers or drink plenty of energy drinks and ingest sweets. The Centre Court roof also closes in the morning to keep the heat out.

Past champions, however, found the heat to be bearable. Rafael Nadal didn't complain as he is used to the Majorcan sun according to his coach Toni Nadal. Roger Federer also described the condition as "perfect" for playing, while Maria Sharapova said her training at Florida have helped her get used to the temperature.

Play suspension due to heat is unlikely but tournament-goers are still encouraged to bring sunscreen, hats, or take cover under umbrellas to prevent heat-related illnesses.

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