Players and their entourages emerge from the Grand Hyatt Melbourne on Thursday. A positive case was discovered at one of the Australian Open quarantine hotels, with some 500 Australian Open players, officials and support staff told to quarantine and get tested.

MELBOURNE, AUSTRALIA – FEBRUARY 04: Players and their entourages emerge from the Grand Hyatt Hotel in Melbourne on February 04, 2021 in Melbourne, Australia. Victoria has reintroduced COVID-19 restrictions after a hotel quarantine worker tested positive for coronavirus on Wednesday. The positive case was from one of the Australian Open quarantine hotels, with some 600 Australian Open players, officials and support staff told to isolate and get tested. All tennis matches at Melbourne Park on Thursday have been called off. Masks are now mandatory indoors across Victoria with gatherings now limited to 15 people in a household while the 75 percent return to work plan, scheduled to begin on Monday has been paused. (Photo by Andy Cheung/Getty Images)