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Berghuis played for AZ Alkmaar from 2012 to 2015, leaving to join Watford for the 2015-16 season. During his time at AZ, he made over 100 appearances and contributed to the team's success in both the Eredivisie and KNVB Cup. Berghuis displayed exceptional skill and creativity as an attacking midfielder, becoming a fan favorite for his consistent performances and integral role in the team's achievements.