Reilly Opelka (born August 28, 1997) is an American tennis player. At 6 feet 11 inches tall, he is the joint-tallest ATP-ranked player ever, along with Ivo Karlović, and can serve in the low-140 mph range. He is a former Junior Wimbledon champion.
Opelka moved from Michigan to Palm Coast, Florida at age 4. He didn't start playing tennis regularly until he began training through USTA in Boca Raton at 13 years old. He credits Tom Gullikson, whom his father knew from playing golf, for much of his early development as a tennis player. Opelka is close friends with Taylor Fritz and was the best man at Fritz's wedding. His uncle is conservative radio personality Mike "Stunt Brain" Opelka.
Opelka won the 2015 Junior Wimbledon tournament, defeating World No. 1 Taylor Fritz en route to beating Mikael Ymer in the final and reached the finals of the Boys' Doubles event (with Akira Santillan) at the 2015 Wimbledon Championships.