Another four coronavirus cases – one of whom Victoria s Chief Health Officer Brett Sutton said was believed to be a player – linked to the Australian Open were confirmed by officials on Monday, bringing the total number of infections to six. In addition to those six cases, a member of the air crew on one of 17 flights chartered by tournament organisers has also tested positive to the virus. The lockdown for players considered close contacts means they cannot leave their rooms to train. Some of the remaining 320-odd players in Melbourne, who are in hotel quarantine but allowed to train for up to five hours per day, missed their session on Monday due to delays that prompted an apology from Tennis Australia.