 He moved to Aalborg Boldspilklub (AaB) in the top-flight Danish Superliga championship in January 1992 and made his Superliga debut in April 1992.In his first year at AaB, Andersen spent his time in the reserve team improving his technique, before he got his national breakthrough when he scored two goals in a Danish Cup game against BK Frem in March 1993.He soon displayed his goal scoring abilities, which earned him the nickname "Red Romario", alluding to Brazilian striker Romario and Andersen's red hair.