Novak Djokovic and Andy Murray have known each other for a quarter of a century.

Top-ranked Novak Djokovic has split with his coach Goran Ivanisevic to end an association that began in 2018 and included 12 Grand Slams for the Serbian tennis player.

ZAGREB Former Wimbledon champion Goran Ivanisevic, who now coaches Novak Djokovic and attended the top-ranked player's exhibition series in Serbia and Croatia, said Friday he has tested positive for the coronavirus. The Croatian great, who won his only Grand Slam title at the All England Club in 2001, wrote on Instagram that he tested positive after two negative tests in the last 10 days. I would like to inform everyone who has been in contact with me that I tested positive and ask them to take extra good care of themselves and their loved ones, Ivanisevic wrote. Four players from those events, including Djokovic and his wife, have said they have the virus. Djokovic has called the rules to keep everyone safe at the U.S. Open extreme.___More AP tennis: https://www.apnews.com/apf-Tennis and https://twitter.com/AP_Sports