MADRID, SPAIN - MAY 03: Reilly Opelka of the USA hits a forehand during his match against Dominik Koepfer of Germany at La Caja Magica on May 03, 2021 in Madrid, Spain. (Photo by Gonzalo Arroyo Moreno/Getty Images)
MADRID, SPAIN - MAY 03: Reilly Opelka of the USA hits a forehand during his match against Dominik Koepfer of Germany at La Caja Magica on May 03, 2021 in Madrid, Spain. (Photo by Gonzalo Arroyo Moreno/Getty Images)