Manchester United vs Arsenal proved an unusually high-tax affair for Week 1 of a Premier League season, and it was ultimately an error that divided the sides at Old Trafford.

Arsenal snuck a narrow 1-0 victory over Manchester United to make the perfect start to their Premier League campaign at Old Trafford.

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Both Ruben Amorim and Mikel Arteta were hoping for a big win to kick-start their new campaign, and Arteta got it. But Amorim will perhaps go home the happier of the two managers given how well his new-look team played. Here's what we learned from a feisty Manchester United vs Arsenal clash at Old Trafford.

Arsenal defied a largely below-par performance to beat Manchester United 1-0 at Old Trafford and make a winning start to their Premier League campaign. The Gunners were not at their best in defence or attack, but a Riccardo Calafiori header from a corner proved enough to earn them three points.