ONE 173

ONE 173: Denver
Promotion	ONE Championship
Date	August 1, 2025 (2025-08-01)
Venue	Ball Arena
City	Denver, Colorado, United States
Event chronology
ONE Fight Night 31 ONE 173: Denver ONE Fight Night 33

ONE 173: Denver is an upcoming combat sports event produced by ONE Championship that will take place on August 1, 2025, at Ball Arena in Denver, Colorado, United States. ^{[1] [2] [3]}

Background

The event will mark the promotion's second visit to Denver and third held in United States, since ONE 168 in September 2024. ^[4]

The event is scheduled to be headline by a ONE Women's Atomweight World Championship unification bout between current champion (also a former ONE Women's Atomweight Muay Thai and Kickboxing World Champion) Stamp Fairtex and interim champion Denice Zamboanga. ^[5]

Fight card

Fight card (Amazon Prime Video)
Weight class				Method	Round	Time	Notes
Women's Atomweight	Stamp Fairtex (c)	vs.	Denice Zamboanga (ic)				[a]

1. For the ONE Women's Atomweight World Championship.

^[6]

See also

• Martial Arts portal

• 2025 in ONE Championship
• List of ONE Championship events
• List of current ONE fighters
• ONE Championship Rankings

References

1. "ONE 173: Denver Announced For August 1; Features Stamp vs. Zamboanga World Title Unification Fight". ONE Championship – The Home Of Martial Arts. 2025-02-28. Retrieved 2025-02-28.
2. "ONE Championship Returns to Denver with Stamp vs. Zamboanga Headlining ONE 173". Combat Press. 2025-02-27. Retrieved 2025-02-28.
3. Staff (2025-02-27). "ONE 173 Booked for Colorado in August, Atomweight Title Unification Bout Featured". Cageside Press. Retrieved 2025-02-28.
4. "ONE Championship returns to United States for ONE 173, featuring Stamp vs. Zamboanga". MMA Knockout On SI. 2025-02-27. Retrieved 2025-02-28.
5. Martin, Damon (2025-02-27). "Stamp Fairtex returns for title unification bout against Denice Zamboanga at ONE 173 in Denver". MMA Fighting. Retrieved 2025-02-28.
6. "ONE 173: Denver". ONE Championship – The Home Of Martial Arts. Retrieved 2025-02-28.