The 2023 Winnipeg National Bank Challenger was a professional tennis tournament played on outdoor hard courts. It was the 6th edition of the tournament and part of the 2023 ATP Challenger Tour. It took place in Winnipeg, Manitoba, Canada between August 14 and 19, 2023.
Singles main-draw entrants
Seeds
1 Rankings are as of August 7, 2023.
Other entrants
The following players received wildcards into the singles main draw: Taha Baadi Dan Martin Brayden Schnur
The following player received entry into the singles main draw using a protected ranking: Thai-Son Kwiatkowski
The following players received entry into the singles main draw as alternates: Billy Harris Christian Harrison Ryan Peniston
The following players received entry from the qualifying draw: Ulises Blanch Darian King Strong Kirchheimer Omni Kumar Aidan Mayo Kiranpal Pannu
Champions
Singles
Ryan Peniston def. Leandro Riedi 6–4, 4–6, 6–4.
Doubles
Gabriel Diallo / Leandro Riedi def. Juan Carlos Aguilar / Taha Baadi 6–2, 6–3.