 Complete the following phrase:  In the summer of 1986, Koeman controversially transferred to PSV Eindhoven to play for Hans Kraays champions. Towards the end of the 198687 season, Kraay resigned and was replaced by Guus Hiddink, under the management of whom PSV overtook league leaders Ajax in the final weeks of the season to defend their league title. Koeman enjoyed further success with Hiddink and PSV in the following seasons, as the team also won the 198788 and 198889 Eredivisie titles and the clubs first, and to date only, 