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The club revealed the news less than an hour before kick-off at Stamford Bridge and said the 21-year-old has started a period of self-isolation.
Havertz has started all seven of the Blues' Premier League games this season following his reported £72million move from Bayer Leverkusen in September, scoring one goal and registering one assist.
He also scored a hat-trick against Barnsley in the Carabao Cup and played from the off in both of Chelsea’s previous Champions League Group E games.
Frank Lampard is now unlikely to have Havertz Chelsea's Premier League clash with Sheffield United on Saturday and it remains to be seen whether he will join up with the Germany squad for their upcoming international fixtures.
