 Berggreen helped the club stay in the Serie A, and was recalled to the Danish national team in October 1982.In the 1983-84 Serie A season, Pisa were relegated into the Serie B, but Berggreen chose to stay with the club.He was selected to compete for the Danish national team at the 1984 European Championship, where he played four matches, and scored a goal in the 5-0 victory against Yugoslavia.