Bayern Munich have confirmed Leon Goretzka and Javi Martinez have tested positive for coronavirus.
The players are self-isolating at home after returning positive results this week, although the club described both as being in "good health".
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They will be unavailable for Saturday's Bundesliga match at home to Hoffenheim.
The European champions then face Hertha Berlin away on February 5 before their Club World Cup campaign starts three days later.
Goretzka has made 20 appearances in all competitions this season, while Martinez, 32, has played 18 times, mostly as a substitute.
Bayern also confirmed goalkeeper Alexander Nubel is likely to be out of action for up to a month.
The former Schalke man, who has only played twice this season, suffered ankle ligament damage on Thursday.
