The timing of the dismissal could not be worse for the Red Devils as they prepare for a high-stakes trip to Stamford Bridge. Martinez currently faces a three-match ban which would see him miss the Chelsea fixture alongside home games against Brentford and Liverpool.
With Matthijs de Ligt still sidelined by a persistent back injury, losing their aggressive enforcer would be a massive blow. Adding to the uncertainty, Harry Maguire is facing further disciplinary action for improper conduct following his red card at Bournemouth last month, potentially leaving the club without three primary central defensive options this weekend.