Manchester United's turbulent start to the season took another dramatic turn in their 2-1 loss to historic rivals Leeds United, with manager Michael Carrick hinting at a potential appeal after a controversial red card marred the match.

The game was decided early by a Noah Okafor brace, but the major flashpoint arrived in the 56th minute. Defender Lisandro Martínez was shown a straight red card by referee Paul Tierney after a VAR review for what was deemed violent conduct—pulling the hair of Leeds forward Dominic Calvert-Lewin.

An incensed Carrick did not hold back post-match, labeling the decision "shocking" and questioning the consistency of the officiating. He pointed to an earlier incident where Calvert-Lewin appeared to catch United's Leny Yoro with an elbow in the build-up to Leeds's first goal, which went unpunished.

"He gets an arm in the face to start with, so he's off balance," Carrick explained regarding Martínez's actions. "He almost just goes to touch him and grab his shirt... he ends up catching his hair. It's not aggressive, there's no jolt, no tug."

The red card carries an automatic three-match suspension, a significant blow for United's defensive line. Carrick's strong comments suggest the club is seriously considering an appeal to overturn the ban, arguing the punishment did not fit the nature of the contact.

This officiating storm overshadows what was just the second loss of Carrick's tenure and adds another layer of frustration for a United side looking to build consistency. For fans and players alike, it's a harsh reminder of how a single moment of controversy can change the complexion of a fiercely contested derby.