William Gallas believes Arsenal made a mistake by appointing Mikel Arteta as manager in 2019.
The Gunners gave the Spaniard his first job in management after sacking Unai Emery, with Arteta winning the FA Cup at the end of the delayed 2019-2020 campaign.
However, his first full season in charge saw the Gunners finish eighth, meaning they missed out on a place in Europe. They were also beaten by Villarreal in the semi-final of the Europa League.
And Gallas, who played for Arsenal from 2006-2010, believes the step into top-level management came too soon for the 39-year-old.