Serbia's Novak Djokovic gestures during a tennis doubles match with Jelena Jankovic against Serbia's Nenad Zimonjic and Olga Danilovic during 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)