Arsenal came from behind to defeat Leeds United 2-1 at Emirates Stadium, with substitute Bruno Guimaraes scoring the decisive winner after James Justin had given the visitors an early lead.

Leeds broke the deadlock through a well-worked move that saw Gabriel Gudmundsson deliver the assist for Justin, whose finish gave Arsenal goalkeeper David Raya no chance. The home side responded through Riccardo Calafiori, who converted after Ben White's header set up the opportunity.

Guimaraes changes everything

The match turned on the 63rd minute when Arsenal manager Mikel Arteta introduced Guimaraes, Viktor Gyokeres, and Jurrien Timber. It was Guimaraes who made the most immediate impact — arriving from midfield to stroke home the winner and hand Arsenal all three points.

Declan Rice had been Arsenal's standout performer in the first half, working to inject energy into a side that struggled to create clear chances. His clever assist set up Guimaraes for the clincher.

A Leeds side that pushed the champions

Leeds were far from passengers. Trafford showed fine passing range in behind a defence that organised well throughout. Ao Tanaka and Ethan Ampadu gave the visitors a solid midfield base, while Calvert-Lewin caused problems for Ezri Konsa and Gabriel Magalhaes with his physical presence.

Calafiori rated among Arsenal's best on the day — his runs forward created some of the few dangerous moments the home side fashioned in a difficult first half. Bukayo Saka troubled Gudmundsson at times but could not convert a late opportunity that might have settled the match earlier.

For Leeds, Tarik Muharemovic and Justin were composed and effective at the back, while Gudmundsson's assist underlined his quality in a performance that showed this Leeds side will be no easy opponent for anyone in the league this season.

Guimaraes, arriving as a substitute, ultimately proved the difference — a timely reminder of the depth Arsenal possess as they look to defend their title.