Arsenal have signed Real Madrid midfielder Martin Odegaard and Sheffield United goalkeeper Aaron Ramsdale.
Norway international Odegaard, 22, joined the Gunners on loan in January and has made the move permanent for about £30m.
The deal for Ramsdale, 23, is worth £24m plus a further £6m in add-ons.
He is available for the visit of Chelsea on Sunday, but Odegaard misses out as he waits for his visa clearance.
The former Bournemouth man, who made 38 Premier League appearances for the Blades last season before being included in England's squad for Euro 2020, will join Bernd Leno and Runar Alex Runarsson as Arsenal's goalkeepers.