Antony scored on his debut and Marcus Rashford netted a brace as Manchester United won 3-1 to hand Arsenal their first defeat of the season.
Erik ten Hag saw his side start well before the Gunners found their rhythm, and the visitors had a goal controversially disallowed after a foul on Christian Eriksen in the build-up to Gabriel Martinelli's finish.
Ad Arsenal continued to dominate the rest of the half, with Gabriel Jesus in particular a constant threat, but they found themselves behind when Eriksen sparked a slick passing move which was finished off coolly by deadline-day signing Antony.
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