Laver Cup - Day 2

Team Europe Grigor Dimitrov of of Bulgaria, Team Europe Novak Djokovic of Serbia and Team Europe Roger Federer of Switzerland react during the Men's Singles match between Team Europe Alexander Zverev of Germany and Team World John Isner of the United States on day two of the 2018 Laver Cup at the United Center on September 22, 2018 in Chicago, Illinois.
(Sept. 21, 2018 - Source: Stacy Revere/Getty Images North America)