World number one Novak Djokovic and his wife have been tested positive for coronavirus, the Serb star becoming the fourth player to contract the virus after taking part in his exhibition tennis tournament in the Balkans. Djokovic, who is "not showing any symptoms" according to a statement from his spokesperson, joins Grigor Dimitrov, Borna Coric and Viktor Troicki in testing positive for COVID-19. Djokovic said his wife Jelena also tested positive while the results of their children were negative. Novak Djokovic has issued an apology and has also admitted it was too soon to hold the Adria Tour which he organised with his brother in Serbia and Croatia. Players were filmed dancing bare-top in a nightclub and embracing each other over the net during the Adria Tour. Even after the matches, there were handshakes among players and chair umpires.