 With most of the 1980s' stars such as Van Basten also leaving, Ajax once again declined.They continued to compete for the title with PSV in subsequent years, who became the dominant club in European and Dutch football, matching Ajax's 1972 achievement of a continental treble in 1988.Negative aspects of the period 1988 from 1991 were the fraud-case in 1989 and a year-long ban from European competition in 1990–91 following an incident whereby a fan threw an iron bar at the Austria Wien goalkeeper during a UEFA Cup tie in the 1989–90 season.