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GENEVA, SWITZERLAND - SEPTEMBER 18: Nick Kyrgios of Team World looks on during a practice session prior to the Laver Cup 2019 at Palexpo, on September 18, 2019 in Geneva, Switzerland. (The Laver Cup consists of six players from the rest of the World competing against their counterparts from Europe. John McEnroe will captain the Rest of the World team and Europe will be captained by Bjorn Borg) The event runs from 20-22 Sept. (Photo by Julian Finney/Getty Images for Laver Cup)

GENEVA, SWITZERLAND - SEPTEMBER 18: Nick Kyrgios of Team World looks on during a practice session prior to the Laver Cup 2019 at Palexpo, on September 18, 2019 in Geneva, Switzerland. (The Laver Cup consists of six players from the rest of the World competing against their counterparts from Europe. John McEnroe will captain the Rest of the World team and Europe will be captained by Bjorn Borg) The event runs from 20-22 Sept. (Photo by Julian Finney/Getty Images for Laver Cup)