Serbian tennis player Novak Djokovic (ATP Number 1) poses for photographers after a press conference on the upcoming Adria Tour tennis tournament in Belgrade on May 25, 2020. - Djokovic will bring together international tennis stars Dominic Thiem (ATP Number 3), Alexander Zverev (ATP Number 7) and Grigor Dimitrov (ATP Number 19) to Belgrade in early June for the first in a series of humanitarian tournaments that he will organized in the Balkans. (Photo by Andrej ISAKOVIC / AFP) (Photo by ANDREJ ISAKOVIC/AFP via Getty Images)
