Forty-seven players will be confined to hotel rooms before the Australian Open after other passengers on their flights tested positive for coronavirus.
The players will not be able to leave their hotel rooms for a fortnight, while their rivals are allowed five hours of daily practice on court.
Australia has given 1,200 people permission to travel to the tournament.
The players affected were on two flights, arriving from Los Angeles and Abu Dhabi respectively. Two people - a member of the flight crew and a person in a player's travelling entourage - tested positive on the Los Angeles flight.