Atlético Madrid coach Diego Simeone has the coronavirus.
The Argentine wasn’t showing any symptoms and was in isolation, the club said on Saturday.
Simeone and the rest of the team were tested on Friday. The club did not say if anyone else was infected.
The Spanish league stopped play from March until June because of the pandemic. The top flight managed to finish the season in July without any major infections.
But as the virus has started to spread again in Spain, teams have reported infections in recent weeks. None have appeared to cause serious health problems for players or staff.
Atlético is scheduled to play a friendly at Cádiz on Tuesday. Like Real Madrid, Barcelona, and Sevilla, Atlético has its first two rounds of the Spanish league postponed to give the teams more rest after the competed in Europe in August. It plays its first Spanish league match on September 27 against Granada.