During Wednesday's Serie A match between AC Milan and Como, Fabregas was accused of pulling Milan player Alexis Saelemaekers' shirt. The incident prompted Allegri to confront his counterpart, resulting in Allegri being shown a red card while Fabregas received no warning.
After the match, Allegri reportedly called Fabregas "such an idiot" and "a kid who started coaching yesterday." Fabregas later apologized for his unsportsmanlike gesture, acknowledging he "made something I'm not proud of" as a coach.