Defender known for impressive passing skills who made his professional debut in 2013 for Arsenal. He played eight games for Watford on loan during the 2013-2014 season.
He began his youth career with Barcelona but joined Arsenal's youth team in 2011.
He made his Spanish national team debut in 2016 and was a member of the 2016 European Championship team, but did not play.
He grew up in Barcelona, Spain.
Arsene Wenger became his manager on Arsenal.