 Complete the following phrase:  After the summer break, Willy van de Kerkhof, present at both the 1978 and 1988 triumphs, was honored with a farewell match. The 198889 season again resulted in the double: Hiddinks squad won the title albeit with less domice than the year before and PSV beat Groningen in the cup final. In comparison, the international competitions were disappointing. The Intercontinental Cup against Nacional ended in a 