Unai Emery spent one year in charge at Arsenal, leading his side to a Europa League final before being sacked shortly after a poor run of games.
The 50-year-old then made the move to the La Liga with Villarreal, while the Gunners opted for former player Mikel Arteta to be their new manager.
Arteta has gone on to transform the squad with a number of signings this summer, looking to move on those who struggled last season in an eighth-placed finish in the Premier League.
That meant a number of Emery’s signings also left, while some are thriving for the Gunners.
With that said, here’s a look at where those signings are now.
The Ivory Coast international was a record signing for the club, costing £72million to sign from Ligue 1 side Lille.
He is still at the Emirates, but has struggled to force his way into the first-team, despite the transfer fee paid for him.
The young defender joined for roughly £27million, but is yet to make his way into the reckoning for the first-team. He spent last season on loan with Nice, but is currently playing for Marseille as a key centre-back for the French outfit.
The midfielder made 89 competitive appearances for the Gunners, playing primarily as a ball-winner in the central ranks. He is currently spending time on loan with Serie A side Fiorentina, who reportedly have an option to sign him permanently at the end of the season.
The Brazilian made the switch across London from Chelsea to Arsenal in a deal worth roughly £7million. He had shown glimpses of his quality, but did struggle with mistakes creeping into his game. Luiz left the club in the summer, joining Brazilian side Flamengo on a free transfer.
Tierney has gone on to be a key player for the Gunners at left-back since his arrival from Celtic. He is still an important part of the set-up Arteta has gone for, driving down the flank to provide attacking width, but injuries have hampered him at times.
The Greece international joined from Borussia Dortmund in 2018, looking to shore up the Arsenal defence. He, much like David Luiz, saw mistakes creep into his game before he left in the summer for Olympiacos.
The goalkeeper started out as Arsenal’s No. 1 and is still at the club, but has since slipped down the pecking order following the arrival of Aaron Ramsdale in the summer. He has made over 120 appearances for the club, but reports suggest he could leave in search of first-team football.
The 27-year-old joined on loan from Barcelona for the season, but only made six appearances in his spell at the Emirates. Following his return to Catalonia, Suarez then moved to fellow La Liga club Celta Vigo, where he has become a key player for the side.
The 22-year-old showed a lot of promise when he first joined the club, with the potential to become a big player for the future. He struggled to break into the side, though, and is currently on loan at Marseille, along with Saliba. Guendouzi may be one who moves on, with reports suggesting he wants to stay with the Ligue 1 side.
The experienced right-back joined on a free transfer as one of the first through the door under Emery. He made 23 appearances in an Arsenal shirt, leaving after his one-year deal for German side Augsburg. Following another one-year deal, he hung up his boots in 2020, putting an end to a long career in professional football.
The youngster joined from Brazilian club Ituano for roughly £6million, which is looking like a bargain given his current form. Martinelli has had a few false starts in an Arsenal shirt, but his run of six goal involvements in six Premier League games has shown the 20-year-old can live up to his potential.
Ceballos spent two years at the Emirates from Real Madrid, where he hoped to kick on and improve his game. While he was a regular for the side, he struggled at times to show what he is capable of before returning to the Spanish capital.
He is still with Los Blancos, but suffered an injury early on and is yet to feature under Carlo Ancelotti, with suggestions he could leave the club in search of regular minutes on the pitch.