The number of players in hard quarantine swelled to 72 ahead of the Australian Open after a fifth positive coronavirus test was returned from the charter flights bringing players, coaches, officials and media to Melbourne for the season-opening tennis major.,Australian Open organizers confirmed late Sunday that the latest case involved a passenger on the flight from Doha, Qatar to Melbourne who was not a member of the playing contingent, But all 58 passengers, including the 25 players, now cannot leave their hotel rooms for 14 days.,There were already 47 players, including Grand Slam winners, in hard quarantine after three positive tests were returned from a charter flight that arrived from Los Angeles and one on a flight that departed Abu Dhabi.,Australian Open tournament director Craig Tiley said organizers and players were forewarned there’d be a “significant risk” of exta restrictions being imposed if there were positive COVID-19 cases.,Tiley said there were no plans to delay the Australian Open any further — it’s already starting three weeks later than usual — although organizers were reviewing the schedule for the warmup tournaments starting Feb. 1 to find ways to make it easier for those players in strict quarantine to prepare.

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