To be fair to Wilander, its not like he dropped of the map in 84-86. He still remained in the top 5 rankings and won the French and Davis cup in 85', R/up in the Austrialian in 85', plus he took Mcenroe to 5 sets in US Open S/final in 85'.
Think this thread should be more like "What Happened to Wilander after 1988." Such a shame he couldnt continue his 87/88 form into the 1990s. If he had, he could have easily beat Roy Emerson's record at the time of 12 majors