Kei Nishikori Pictures
MONTE-CARLO, MONACO - APRIL 17: Kei Nishikori of Japan plays a backhand against Pierre-Hugues Herbert of France in their second round match during day four of the Rolex Monte-Carlo Masters at Monte-Carlo Country Club on April 17, 2019 in Monte-Carlo, Monaco. (Photo by Clive Brunskill/Getty Images)