1990 SkyDome World Tennis Tournament – Singles

Joakim Nyström was the champion of the event when it last took place, in 1986. He did not participate in 1990. Ivan Lendl won the title, defeating Tim Mayotte 6–3, 6–0, in the final.

Seeds
The top eight seeds receive a bye into the second round. • # Ivan Lendl (champion)

• # 🇺🇸 Brad Gilbert (semifinals)

• # 🇺🇸 John McEnroe (semifinals)

• # 🇺🇸 Aaron Krickstein (quarterfinals)

• # 🇺🇸 Jay Berger (quarterfinals)

• # 🇺🇸 Tim Mayotte (final)

• # 🇪🇨 Andrés Gómez (second round)

• # 🇺🇸 Kevin Curren (quarterfinals)

• # 🇺🇸 Jim Courier (second round)

• # 🇵🇪 Jaime Yzaga (third round)

• # 🇺🇸 David Wheaton (first round)

• # 🇺🇸 Jim Grabb (first round)

• # 🇦🇺 Wally Masur (first round)

• # 🇺🇸 Scott Davis (first round)

• # 🇺🇸 Pete Sampras (first round, retired)

• # 🇫🇷 Jean-Philippe Fleurian (first round)