Wimbledon fans sweltered in the heat as temperatures peaked at almost 30C (86F).
After queuing for hours as the day got warmer, they were then faced with the mercury hitting 29.1C (84.4F).
Some sitting on Henman Hill took to putting up umbrellas, usually seen at SW19 to provide shelter from the rain, in order to gain some shade from the sunlight.
Throughout the day queues could be seen around water fountains and water refill points as spectators did their best to stay hydrated.
St John's Ambulance treated at least 22 people for suspected heat-related conditions.
But it was not just fans feeling the heat.
Piles of stewards' jackets could be seen lying out of sight as they stripped off a top layer and took to manning the grounds in just their shirtsleeves.
However, the players did not seem to bothered by the conditions, saying that the short points and lack of humidity made them manageable.
The hot weather is set to continue, with the Met Office forecasting the hot weather to continue.
Met Office meteorologist Bonnie Diamond said: "It will stay in the mid to high 20s through the rest of the week.
"It will stay dry with plenty of sunshine."