Arsenal have activated the £27m option to permanently buy Brentford goalkeeper David Raya after his successful loan spell last season.
Raya, 28, kept 16 Premier League clean sheets for the Gunners to win the Golden Glove, conceding just 16 league goals in the campaign.
Arsenal already had a settled keeper in Aaron Ramsdale, who had played all 38 of their matches the previous season, keeping 14 clean sheets, but boss Mikel Arteta opted for a new option.
In August, the Spaniard signed a new two-year contract with the Bees before joining the Gunners on a season-long loan.