GENEVA, SWITZERLAND - SEPTEMBER 17: Stefanos Tsitsipas of Team Europe serves during a practice session prior to the Laver Cup at Palexpo on September 17, 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 Clive Brunskill/Getty Images for Laver Cup)
