Brazil's Supreme Court has decided on Friday that the Copa America, which is set to start on Sunday, can go ahead in Brazil,
Judges held an emergency session on Thursday to consider requests to halt the competition because of the coronavirus pandemic.
It was argued that hosting the tournament would endanger the lives of thousands of people. The judges said that the Brazilian constitution did not give the court the power to block it.
But they said that state governors and city mayors should do more to ensure "appropriate health protocols" are respected.
Teams face mandatory testing every 48 hours. Their movements will be restricted and they will travel to host cities aboard chartered flights.
The tournament, postponed from 2020 because of the coronavirus pandemic, was originally to have been staged in Colombia and Argentina.
But Colombia was removed as co-host on 20 May because of domestic civil unrest, and Argentina was then stripped of its host status on 30 May, with organisers citing coronavirus concerns and the "present circumstances".
Earlier this week, Brazil's players criticised the decision to hold the tournament in their country.
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