Laver Cup - Day Two

PRAGUE, CZECH REPUBLIC - SEPTEMBER 23: Roger Federer of Team Europe plays a backhand during his singles match against Sam Querrey of Team World on Day 2 of the Laver Cup on September 23, 2017 in Prague, Czech Republic. The Laver Cup consists of six European players competing against their counterparts from the rest of the World. Europe will be captained by Bjorn Borg and John McEnroe will captain the Rest of the World team. The event runs from 22-24 September. (Photo by Justin Setterfield/Getty Images for Laver Cup)