2018 Winnipeg National Bank Challenger – Men's singles

Blaž Kavčič was the defending champion but chose not to defend his title.

Jason Kubler won the title after defeating Lucas Miedler 6–1, 6–1 in the final.

Seeds
• # 🇨🇦 Peter Polansky (second round)

• # 🇪🇸 Marcel Granollers (semifinals)

• # 🇺🇸 Michael Mmoh (second round)

• # 🇦🇺 Jason Kubler (champion)

• # 🇯🇵 Tatsuma Ito (first round)

• # 🇯🇵 Go Soeda (semifinals)

• # 🇨🇦 Filip Peliwo (second round)

• # 🇨🇦 Brayden Schnur (first round)