Federer Quiz from
Dominic Thiem Photos - Dominic Thiem of Austria plays Diego Schwartzman of Argentina during the Rio Open at Jockey Club Brasileiro on February 2016 in Rio de Janeiro, Brazil.
Richard Gasquet of France serves to Leonardo Mayer of Argentina during their first round Men's Singles match on Day Three of the 2017 US Open at the USTA Billie Jean King National Tennis Center on August 30, 2017 in the Flushing neighborhood of the Queens borough of New York City.