The Belgium midfielder fell ill with sickness and vomiting in the dressing room, causing him to miss the 3-3 draw in the Bernabeu. He suspected it was something he ate in the team hotel before kick-off. City was concerned that more players could be affected.
De Bruyne has since recovered and returned to training for the next match. Guardiola feared losing multiple key players as they pursue back-to-back Trebles. However, it seems De Bruyne’s illness was an isolated incident.
Looking ahead, City may have to play without Kyle Walker once again.