- Calum Chambers (€20.23m)
The 21-year old defender joined the Gunners back in 2014 from Southampton has not been able to cement a place in the starting lineup. He was considered one of the best young defenders in the league at that time but Wenger has not been impressed by his returns and has sent him on loan to Middlesbrough this season. He has made just 36 appearances for Arsenal till now and has not been able to justify his price tag from a couple of years ago