(LtoR) German tennis player Alexander "Sascha" Zverev, Serbian tennis player Novak Djokovic, Bulgarian tennis player Grigor Dimitrov and Austrian tennis player Dominic Thiem pose for a selfie during a press conference of the Adria Tour, a charity exhibition hosted by Novak Djokovic, on June 12, 2020 in Belgrade. - The ATP and WTA Tours have been suspended since March due to the COVID-19 pandemic and will not resume at least until the end of July 2020. (Photo by Andrej ISAKOVIC / AFP)