Reilly Opelka
Most people will know this tennis star by his towering height of 6 ft 11 inches. But what many people don’t know is that he was a junior Wimbledon champion. What most people don’t know is that he has served one of the fastest tennis serves ever, with a speed of 233 km/h (145 mph) at the 2016 U.S. Men’s Clay Court Championships.
Reilly Opelka
Nadiia Kichenok
She may not be the first tennis star to pair up with her sister, but she and her sister Lyudmyla Kichenok, are twins – now that’s new! Nadiia was born in Ukraine in 1992 and has won three WTA doubles titles, two of which were shared with her twin sister. What she didn’t share with her twin however, was the 8th fastest serve by a female tennis player at 202.0 km/h (125.5 mph). She achieved this at the 2014 Australian Open.
Nadiia Kichenok
