[5] with its last three events being absorbed into the 1990 ATP Tour in September that year World Championship Tennis ceased trading.
The WCT Finals in Dallas saw the unexpected defeat of McEnroe in the quarterfinals by Joakim Nyström in three straight sets.
The WCT Atlanta Championships tournament was marked by early exits of top seeds Stefan Edberg and Boris Becker in the first round.
In Dallas, Anders Järryd was the unexpected winner, having replaced the injured Ivan Lendl in the 12-player draw.
Only three events were organized, all of them were incorporated into the Nabisco Grand Prix and gaining ATP ranking points.
The tournament was negatively impacted by the withdrawals of Boris Becker (who did not appear at all) and Andre Agassi (walking off the court during a second set match with McEnroe).
Brad Gilbert entered the event to fill the gap for Becker and surprisingly made it to the final.
[7] The Forest Hills WCT at West Side Tennis Club was moved from green clay to hardcourts and run as special non-ATP Tour event.