Brazilian tennis umpire Carlos Bernardes was rushed to the hospital after suffering a heart attack while in quarantine in Melbourne.
The incident comes ahead of next month’s Australian Open.
More than 70 players and their entourages are confined to their hotel rooms for 14 days and unable to train for the February 8-21 Australian Open after passengers on three charter flights returned positive tests for COVID-19.
Reports suggest that players who arrived on different flights have also been undertaking a mandatory quarantine, however, are permitted to leave their hotel rooms for five hours a day to train.
A total of 10 people associated with the Grand Slam have now tested positive for the virus, four of which are players.
Mexico bounce Czechs out of World Cup with win
South Africa beat South Korea to reach World Cup knockout stage for first time
Qatar’s Assim Madibo gets 5-game ban for injuring Canada's Ismael Kone
Morocco earn comeback win over Haiti to reach last 32
Brazil heads into World Cup knockouts with win over Scotland
