1981 Toronto Molson Light Challenge

Vitas Gerulaitis won the final 6–4, 4–6, 6–3, 6–3 over John McEnroe.

Players
• # 🇺🇸 Vitas Gerulaitis (champion)

• # 🇺🇸 John McEnroe (final)

• # 🇸🇪 Björn Borg (semifinals)

• # 🇺🇸 Jimmy Connors (semifinals)

• # 🇺🇸 Sandy Mayer (round-robin)

• # Johan Kriek (round-robin)

• # 🇵🇱 Wojciech Fibak (round-robin)

• # 🇷🇴 Ilie Năstase (round-robin)