Table:
text: WCT Tournament of Champions
Singles
Singles
Location_ Year_ Champion Runner_up Score
Forest Hills 1987 Andrés Gómez Yannick Noah 6–4, 7–6, 7–6
Forest Hills 1988 Andre Agassi Slobodan Živojinović 7–5, 7–6, 7–5
Forest Hills 1989 Ivan Lendl Jaime Yzaga 6–2, 6–1
Forest Hills 1990 Ivan Lendl Aaron Krickstein 6–4, 6–7, 6–3

Question: Who was runner-up in the 1990 WCT Tournament of Champions (single edition)?