Thanasi Kokkinakis Pictures

  • PRAGUE, CZECH REPUBLIC - SEPTEMBER 22: Frances Tiafoe, Thanasi Kokkinakis, Nick Kyrgios and Jack Sock of Team World react on the players bench as Denis Shapovalov of Team World plays his singles match against Alexander Zverev of Team Europe serevs on the first day of the Laver Cup on September 22, 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 Julian Finney/Getty Images for Laver Cup)