As a left back, Monreal plays for the Premier League club Arsenal. He joined Arsenal in 2013 after playing for Osasuna and Malaga in La Liga. A full international since 2009, Monreal represented Spain at the 2013 Confederations Cup. Together with Arsenal, he won 2 FA Cups and 2 Community Shields in 2014, 2015 respectively.
He made his official debut for his hometown club CA Osasuna.
He grew up in Pamplona, Spain.