In the fifth round of the Premier League, Arsenal suffered their first defeat of the season, losing 3-0 away to Brighton & Hove Albion. This marks Arsenal's largest margin of defeat as defending Premier League champions since 1989.

In this away match against Brighton & Hove Albion, Arsenal, as the defending Premier League champions, lost 3-0 to their opponents, suffering their first defeat of the season.

According to statistics, this is Arsenal's largest league defeat by margin as defending top-flight champions since October 1989, when they lost 3-0 away to Everton.

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