Arsenal dropped points following a 1-1 draw at home to Brighton after Declan Rice was shown the first red card of his career.
Raheem Sterling has joined Arsenal on a season-long loan from Chelsea, while Ivan Toney made the switch from Brentford to Al-Ahli, marking one of the most eventful transfer deadline days in recent memory.
Arsenal midfielder Fabio Vieira has joined Portuguese giants Porto on a season-long loan.
Arsenal have secured Bournemouth goalkeeper Neto on a season-long loan, bolstering their squad with experienced cover between the posts.
Brighton's Fabian Hurzeler has hailed Arsenal as one of the best teams globally ahead of their Premier League clash at the Emirates this Saturday.
Arsenal have completed the signing of Spain midfielder Mikel Merino from Real Sociedad.