Wimbledon is the last Grand Slam to play 64 matches on its first day. That's worse for revenue, but better for tennis.

Novak Djokovic launches his bid for a record 25th Grand Slam crown at Wimbledon on Tuesday as Barbora Krejcikova begins her title defence with major questions over her fitness on another sizzling day in London.

The London Underground — how the majority of people travel to Wimbledon — closes at approximately midnight on weekdays and it can take fans 20 minutes to get to the station from the All England Club. Rules state a match cannot go past 11 p.m. local time.