Borussia Dortmund forward Thorgan Hazard tested positive for COVID-19 on Monday and will miss the team’s Champions League game at Sporting Lisbon on Wednesday.

Dortmund said the 28-year-old Hazard did not have any contact with any of his teammates on Monday or Sunday, and that the Belgian was self-isolating.

“All members of the Dortmund first-team squad and the under-23s as well as both teams’ support staff are 100% vaccinated or recovered,” the club said. “Further quarantine measures are from that point of view not necessary.”

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Dortmund’s situation contrasts sharply with league rival Bayern Munich. The Bavarian team has five unvaccinated players in quarantine after they had contact with an infected person or persons, while it also has two players who tested positive for COVID-19.

Bayern was bringing a depleted team to its Champions League game at Dynamo Kyiv on Tuesday.

Dortmund hosts Bayern for a potentially decisive game in the Bundesliga on December 4.