 Complete the following phrase:  After Zec left in 1986, there were great changes in the club. The management of the club, run by Dragan Džajić and Vladimir Cvetković, began to build a team that could compete with some of the most powerful European sides. During that summer, Velibor Vasović became coach and the side was strengthened by acquiring a number of talented young players, among whom Dragan Stojković and Borislav Cvetković stood out. In the first season that started with penalty points, Red Star focused on the European Cup and achieving good results. In 1987, a five-year plan was developed by the club with the only goal being to win the European Cup. All that was planned was finally achieved. On the clubs birthday in 1987, it started. Real Madrid were defeated at the Marakana. From that day through to March 1992, Red Star enjoyed the best period of success in its history. In these five seasons, Red Star won four National Championships; in the last of those four years of heyday, the club won the 