In the Matchweek 4 Manchester Derby, a 10-man Manchester City side defeated Manchester United 1–0, thanks to a winning goal from the owner of No. 9 soccer shirt, Erling Haaland. However, the goal sparked significant controversy after the match due to suspected offside.

In the 60th minute, Haaland, wearing the Manchester City jersey, broke the deadlock by arriving at the far post.Although the assistant referee initially signaled for offside, VAR intervened and ruled that Haaland was onside; ultimately, referee Michael Oliver awarded the goal without reviewing the footage on the pitchside monitor.

Following this defeat, Manchester United has recorded one win, one draw, and two losses (four points) in the first four games of the new season, sitting temporarily in 13th place in the standings. Manchester United's players and coaching staff were deeply dissatisfied with the situation. Subsequently, the professional refereeing body officially acknowledged an "error in judgment" regarding Haaland's winning goal in the derby and has contacted Manchester United.