Why is Australia risking everything for tennis?

Following fraught negotiations between Tennis Australia and the Victorian government, the Australian Open is set to take place next month. Like all arrivals to Australia, the players must quarantine for 14 days. However, they have been granted five hours a day of leave to practise. That is, unless they come into contact with a positive case. Despite the best efforts of Tennis Australia, which put on socially-distanced chartered flights, a handful of positive tests have forced over 70 players to ‘hard’ quarantine - unable to leave their rooms.