RIO DE JANEIRO, BRAZIL - AUGUST 6, 2016: Daria Kasatkina of Russia wipes her face during the first round of the women's singles tennis tournament against Ons Jabeur of Tunisia at the Rio 2016 Summer Olympic Games, at the Olympic Tennis Centre. Kasatkina won the match 3:6, 7:6 (7:4), 6:1. Valery Sharifulin/TASS (Photo by Valery Sharifulin\TASS via Getty Images)
