The English midfielder left early in the 0-3 win over Girona in LaLiga.
Real Madrid won 0-3 against Girona in LaLiga and moved closer to Barcelona at the top of the table, who stumbled against Real Betis earlier in the day.
However, Los Blancos' smiles were quickly squashed when Jude Bellingham left the field early due to an apparent injury suffered around the hour mark. He was replaced by Dani Ceballos.
Mbappé found the net, as did Arda Güler, who put the result out of reach after the Englishman's first half.
What injury does Jude Bellingham have?
Although the club have not confirmed the extent of the injury at the time of writing, it is believed the Englishman felt something in his leg and was taken off as a precaution.
Real Madrid have a crucial Champions League match against Atalanta next week, and it would be a dangerous match to risk such an important player.
It is not the first time that the midfielder has suffered from physical problems this season, with most of the Real Madrid squad having suffered some sort of injury during the current season and Bellingham was left out earlier this season with a plantaris muscle injury. This time, however, it is hoped that it will not be so serious.
The match between Atalanta and Real Madrid will be played on Tuesday, December 10 at Gewiss Stadium with kick-off at 3:00 PM ET / 12:00 PM PT.
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