Venue Location
Arena CDMX (formerly Palacio de los Deportes), Mexico City, Mexico. This historic indoor arena in central Mexico City is at high altitude (~7,350 ft / 2,240 m), which often rewards fighters with superior cardio, efficient pacing, strong grappling, or measured striking over high-output aggressors who may fade. The Octagon setup provides excellent sightlines, and the passionate local crowd adds intensity, though neither fighter is Mexican (Chiasson USA, Perez Argentina).
Ringwalks are scheduled for
- Prelims: 5:00 PM ET / 4:00 PM CST (Paramount+)
- Main Card: 8:00 PM ET / 7:00 PM CST (Paramount+)
The Macy Chiasson vs. Ailin Perez women’s bantamweight bout is on the preliminary card (mid-prelims, likely fights 2–6 of 13 total). Expected walkout around 6:00–7:30 PM ET, depending on earlier bouts. Full event spans 4–6 hours.
Injury Report
No reported injuries, withdrawals, or health concerns for either fighter as of February 23–24, 2026.
- Macy Chiasson is cleared and healthy after her recent decision losses; no lingering issues.
- Ailin Perez shows no acute problems post her January 2025 win; both have prepared for altitude with no public flags in camp reports or media. UFC confirms event safety amid regional notes.
Fighter Matchups / Tale of the Tape
Macy Chiasson vs. Ailin Perez (“Fiona”) – Women’s Bantamweight (135 lbs)
- Chiasson: 34 years old (born July 27, 1991), 11-5-0 pro (UFC tenure), 5’11” (180 cm), 72″ reach, orthodox/switch, New Orleans, Louisiana, USA. Tall, rangy striker with power (3 KO/TKO, 3 SUB wins), solid grappling, and experience vs. top competition.
- Perez: 31 years old (born October 5, 1994), 12-2-0 pro (5-1 UFC), 5’5″ (165 cm), 66″ reach, orthodox, Zarate, Buenos Aires, Argentina (The Goat Shed Academy). Explosive finisher (4 KO/TKO, 2 SUB), high-volume grappler, strong wrestling, and momentum.
Style Breakdown: Chiasson leverages height/reach advantage (+6″ height, +6″ reach) for striking range, counters, and clinch work. Perez counters with pressure, power, takedowns, and ground control (recent subs/decisions). Perez holds momentum/volume edges; Chiasson has size/experience advantages. Altitude may favor Perez’s grinding style if Chiasson can’t maintain distance early.
Recent Form
- Chiasson (11-5, recent 2-fight skid): Struggling lately. Losses: unanimous decision to Yana Santos (October 4, 2025) and Ketlen Vieira (May 31, 2025). Prior win: TKO doctor stoppage over Mayra Bueno Silva (June 2024). Ranked ~#8, on cusp of contention but needs rebound.
- Perez (12-2, 5-fight win streak): Surging. Wins: unanimous decision over Karol Rosa (January 18, 2025), arm-triangle sub over Daria Zhelezniakova (September 28, 2024), unanimous decision over Joselyne Edwards (June 1, 2024). Longest active streak in division; ranked ~#8–#10, pushing for top-5.
Fight History / Key Notes
No prior head-to-head. Chiasson (long UFC run) has wins over ranked foes but recent decisions highlight durability/vulnerability to volume. Perez (fast riser post-2022 debut) excels in finishes/pressure; 5-fight streak includes ranked scalps. Top-10 clash with title implications—winner likely jumps rankings. Altitude + Perez momentum vs. Chiasson’s size/experience. Expect grappling exchanges; Perez seeks control, Chiasson counters from range.
FIGHT ODDS
Macy Chiasson + 150
Ailin Perez – 170
Odds Courtesy of Sports Odds Direct as of Friday, February 27, 2026
