Arsenal boss Mikel Arteta admits he's delighted with David Raya's impact this season.
The goalkeeper has spent the campaign on-loan at Arsenal from Brentford and will be signed permanently this summer.
Arteta told ESPN Brasil: "We wanted to improve in this role, bring other qualities to the goalkeeper role.
"If you want to improve you have to raise your level and make a decision!"
Raya kept another clean sheet for Sunday's win at Manchester United.