The United States isn't the only country experiencing severe heatwaves of late. As the mercury rises across Europe, players at this year's Wimbledon tournament are also feeling the effects. Per the Tennis Channel,

Wimbledon experienced its hottest-ever start on a scorching Monday as temperatures climbed to 32.3 degrees Celsius and transformed the All England Club into a sizzling spectacle of sun hats, shade-seekers and fans reaching for water bottles.

Some players have said the calls are too quiet. Others say they miss the tradition. How has the first day of electronic line-calling gone at Wimbledon?

Ninth-seeded Daniil Medvedev is out of another Grand Slam tournament in the first round after losing to 64th-ranked Benjamin Bonzi 7-6, 3-6, 7-6, 6-2 at Wimbledon.

Wimbledon starts on Monday with 23 British players in the men's and women's singles - the most since 1984. Find out who's playing and why so many Britons are competing.