This photograph taken on June 18, 2020, shows (L/R):Croatia's Borna Coric, Bulgaria's Grigor Dimitrov, Serbia's Novak Djokovic and Germany's Alexander Zverev, tennis players as they pose for a group photograph ahead of an exhibition basketball match in Zadar. - Croatia's Borna Coric announced on June 22, 2020, that he has become the second player to test positive for coronavirus after taking part in an exhibition tournament in Croatia featuring world number one Novak Djokovic. "Hi everyone, I wanted to inform you all that I tested positive for COVID-19," the Croatian, ranked 33rd in the world, posted on Twitter. It follows the June 21, announcement by Grigor Dimitrov that he had also tested positive after pulling out of the exhibition event, which is one of the biggest since the tennis season was halted because of the pandemic. (Photo by STRINGER / AFP) / Croatia OUT