Arsenal delivered a commanding performance to hand Manchester United their first loss under new manager Ruben Amorim, winning 2-0 in a clash dominated by set-pieces.
Jurrien Timber and William Saliba both scored from corners, propelling the Gunners to victory and reducing Liverpool's lead at the top of the Premier League table.
Arsenal now sit third with 28 points, level with Chelsea and seven behind league leaders Liverpool.
The breakthrough came in the 54th minute when Declan Rice's near-post corner was expertly headed in by Timber.
