Bundesliga relegated Schalke 04 goes to a quarantine training camp a few days before the start of the second division.
As the club announced, the suspicion of a corona case in the team had previously been confirmed by a PCR test.
The player not named remains in isolation.
"The licensed player department goes to a voluntary quarantine training camp to prevent possible chains of infection and thus also to protect the families of the players and staff," said the Schalke.
The league opening game against Hamburger SV on Friday (8.30 p.m. in the FAZ live ticker for the second division as well as on Sat.1 and Sky) is currently not at risk.
On Monday, Schalke canceled his afternoon training due to a positive rapid test.
"The daily series of tests will of course continue in line with the DFL's hygiene concept, the strictest protective measures apply," it said.
Schalke will "of course immediately and completely implement all orders from the authorities".
All other rapid tests had given negative results.
According to the German Football League (DFL), quarantine training camps are used to ensure that the game can be played. This measure had been ordered for the last two match days of both professional leagues in the preseason, for example. Players, coaching team and support staff are therefore only allowed to have contact with one another. After leaving the "bubble", strict test requirements apply to re-entry.