The England international was at fault for a number of the Reds' goals on the day and looked more like a Sunday League player than the captain at one of the world's biggest clubs.
Maguire's displays throughout the 2021/22 season have been nothing short of abysmal, particularly when you consider how good he was at Euro 2020 over the summer.
If he can't find form sooner rather than later, Ole Gunnar Solskjaer - or whoever the United manager is - will have to consider dropping him from the starting XI.
That's how bad things have got and Maguire isn't exactly improving the situation with his questionable comments in the build-up to Saturday's meeting with Tottenham Hotspur.
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On Friday, a video of the former Leicester City man talking about how United players 'don't look at the stats' surfaced on social media and it's not exactly the response you expect from an elite-level footballer.
Take a look for yourself...
Video: Maguire says Man Utd players "don't look at the stats"
Strange, very strange indeed.
In the modern day, surely every professional - particularly those who are high-profile - should analyse the stats in order to improve their own and the team's game, right?
If they're not, they certainly should be.
Now, if you're wondering what kind of defensive stats Maguire was responding too, don't worry, we've got you covered.
Warning, the evidence below may shock you...
Image: Man Utd's shocking defensive stats in 2021/22
Yes, you're reading that correctly, a team that were labelled 'Premier League title challengers' before a ball was kicked this season are dead last when it comes to tackles.
United have also committed the most errors leading to shots, which won't surprise anyone who's watched the Red Devils in action on a regular basis in 2021/22.
It's simple, if the team don't improve defensively from the Tottenham game onwards, Champions League qualification will be a struggle and Solskjaer will be out of a job in no time.
Maybe it's time to start having a glance at the stats in order to achieve more positive on-pitch results, guys...