Gary Neville blasted Casemiro for his role in Arsenal's opening goal against Manchester United.
The Gunners faced a potentially difficult task in what was considered by most to be a must-win game at Old Trafford on Sunday, but any early nerves were eased by an early goal from Leandro Trossard.
United were up against it going into the game, with Erik ten Hag's side still plagued by injuries and fielding their 14th different centre back pairing of the season.
Despite a better start than they managed in their 4-0 humiliation by Crystal Palace on Monday, it quickly unravelled with Trossard poking in when Casemiro struggled to get forward following a goal kick.