Colombian international has agreed terms with the club and will join on a long-term contract for an undisclosed fee
First images of Colombia international goalkeeper in new colours after agreeing to move
Club pays tribute to former Gunner and FA Cup winner, who has died at the age of 89
Arsene Wenger spoke to the media after his side fell to a 1-0 defeat against New York Red Bulls on Saturday evening
Extended, bitesize clips of our second pre-season friendly of the summer available now
'I want to play week-in, week-out and have a first full season without injuries'
Stoney scores from the spot but Ladies have to settle for a point after conceding a late equaliser
Join the conversation on Arsenal's trip to the Big Apple by leaving your messages on social media
Arsenal's trip to New York may have ended with a loss, but it was the fans who won
#ArsenalNYC Blog:The main event
Arsene Wenger's squad play the New York Red Bulls on Saturday, but it is not the club's first visit to the Big Apple...
Tactical expert Michael Cox examines where Alexis played for his previous clubs and Chile, and how he might fit in at Arsenal
Arsenal Analysis:Alexis Sanchez
Tactical expert Michael Cox looks at the significant shifts in the Gunners' tactics during the victorious FA Cup run