Lisandro Martinez believes Manchester United suffered an "injustice" as Erling Haaland's contentious goal saw them lose 1-0 to 10-man Manchester City.United played against 10 men from the 23rd minute of the Manchester derby after Phil Foden was shown a straight red card for kicking out at Bruno Fernandes after a coming together.It did not prove to be a turning point as United struggled to make their numerical advantage count – albeit hitting the woodwork twice – before the winner came in the 60th minute.Haaland rifled home Josko Gvardiol's cross, with the offside flag initially going up to cut his celebrations short, but the onfield decision was overturned following a VAR review.However, United were left aggrieved after Enzo Fernandez, being marked by Martinez, attempted to get on the end of the cross, having strayed past the backline when the delivery went into the box.The goal stood as Fernandez had not made contact with the ball, but Martinez claimed his decision-making had been affected by his compatriot's movement."I think [Fernandez] was offside. What I can't understand is the rules," Martinez told Sky Sports."He was there! I went to him because he was in front of me. That's why Haaland was free at the back."I want to be calm, but it is so hard. Every season the officials come to our club and spend an hour explaining the rules, and they look so confident with that."Then, after, five or six people [officials] doing this kind of mistake in the Premier League is unacceptable."We have to go home with this injustice."Asked if he would have been marking Haaland if Fernandez was not there, he added: "Definitely, it's as simple as that."A disappointing afternoon but we can't thank you enough for your support.We'll dust ourselves down and go again on Wednesday pic.twitter.com/bhXWqvjXhb— Manchester United (@ManUtd) September 13, 2026Fifty teams have received a red card as the visiting team at Old Trafford in the Premier League, with City only the second to win in that instance, after Everton last term (1-0).United struggled to mount a threat, generating just 0.95 expected goals (xG) and having just two shots on target after Foden's dismissal.But Carrick, like Martinez, was left questioning the decision to award Haaland's goal."I'm confused. We put things in place in the game now. We have people in offices with all the screens for this decision," Carrick told Sky Sports."It's more worrying about if that's the interpretation of football now. If that's the interpretation of not interfering in the game now, that's really worrying for me. It's a staggering explanation."The decision isn't going to change the season, but it's had a major impact on the game. That decision wasn't on us."It's up to us to create and score after that. We had moments. Of course, it's up to us to do that, but big moments in games like that have a big impact."We did a lot of things well; it looked like we were growing well into the game. We looked dangerous. We'll take the positives from the game and move on well, but we're not moving on lightly."We could have created more. That's an answer for us, but we could have. That's our second defeat now, since I've been in charge, but we're a good team, and we'll get back to winning ways."The post Martinez: Man Utd must go home with injustice of Haaland winner appeared first on SoccerNews.