Unai Emery has been sacked as Arsenal manager after 18 months in charge.
The Spaniard was appointed Gunners boss in May 2018, succeeding Arsene Wenger.
He has been replaced on a temporary basis by assistant and former Arsenal midfielder Freddie Ljungberg.
Arsenal said the decision had been “taken due to results and performances not being at the level required”.
The Gunners have not won in seven games and lost 2-1 at home to Eintracht Frankfurt in the Europa League on Thursday.
It is their worst competitive run without a victory since February 1992, which was eight games under George Graham.
Speaking on behalf of the Arsenal board and owners Kroenke Sports & Entertainment, Josh Kroenke said: “Our most sincere thanks go to Unai and his colleagues who were unrelenting in their efforts to get the club back to competing at the level we all expect and demand. We wish Unai and his team nothing but future success.”
The search for a new head coach is underway and we will make a further announcement when that process is complete.