 Complete the following phrase:  In 1989, Koeman re-joined his former Ajax coach Johan Cruyff at Barcelona, where he became a member of the famous Dream Team. During his first season at the club, Barcelona won the Copa del Rey, beating Real Madrid 20 in the final. Along with players such as Hristo Stoichkov, Romário, Pep Guardiola and Michael Laudrup, Koeman helped the club win La Liga four years in a row from 1991 to 1994. In 1992, he scored the only goal of the 