In a heated rematch simmering since their January 2025 war, Coachella’s “Mighty” Brook Sibrian seeks payback and the vacant WBC International Women’s Light Flyweight title against Los Angeles’ relentless Gloria Munguilla at Ace Mission Studios. This 10-round co-main event—sandwiched between cruiserweight headliner Badou Jack vs. Norair Mikaeljan II and undercard gems—revives a rivalry born from controversy: Munguilla’s narrow unanimous decision stole Sibrian’s unbeaten streak, sparking debates over aggression vs. effective punching. At 32, Sibrian (now 8-2 after a dominant TKO in August) channels her power and local fire to reclaim momentum toward a world ranking; the 34-year-old Munguilla (8-2, decision specialist) eyes a second straight signature win to solidify her contender status. With both undefeated at home and trading barbs on social media, expect a phone-booth grinder: Sibrian’s pressure hooks vs. Munguilla’s slick counters, with mid-round clinches and body work deciding a bout leaning decision (85% probability)—a potential trilogy-maker in women’s light flyweight.
Fight Information
Time: Ring walks approx. 9:00 p.m. ET / 6:00 p.m. PT (main card starts 8:00 p.m. ET / 5:00 p.m. PT)
Venue: Ace Mission Studios, 516 S. Mission Road, Los Angeles, California (capacity: ~2,000; gritty warehouse arena with a club-fight intimacy, buzzing with SoCal boxing faithful and “Championing Mental Health 2” event energy)
Broadcast: UFC Fight Pass (global streaming, $9.99/month; prelims on YouTube/UFC Fight Pass app)
Bout Context: 10 rounds at light flyweight (108 lbs) for the vacant WBC International Women’s title; co-main to Jack-Mikaeljan II (cruiserweight, 12 rounds). Promoted by Bash Boxing, 360 Promotions, and Versace Promotions.
Injury Report
Both fighters passed weigh-ins without incident (Sibrian 107.5 lbs, Munguilla 108 lbs) and received full medical clearances from the California State Athletic Commission. No injuries reported in camps—Sibrian’s prep was flawless post her August TKO, while Munguilla’s September UD was clean. Historical notes: Sibrian dealt with a minor hand wrap issue in January (non-impactful); Munguilla has no major setbacks, though her decision-heavy style risks cuts in clinches.
| Fighter | Key Notes | Status |
| Brook Sibrian | Full camp; no issues since August 2025 TKO. Past: Minor hand tweak (January 2025 first fight), resolved. | Cleared |
| Gloria Munguilla | Healthy post-September UD; extended prep for rematch. Past: No reported injuries; durable in wars. | Cleared |
Key Fighter Matchups
Orthodox vs. orthodox in a pocket-sized pressure cooker: Both 5’1″ with ~60″ reaches, but Sibrian’s 50% KO rate edges Munguilla’s volume (lands 40% total punches). Projected: Sibrian advances early; Munguilla circles mid-fight.
Sibrian’s Power vs. Munguilla’s Evasion: Sibrian (8-2, 50% KO) unleashes compact hooks and body shots to close distance, as in her TKO7 of Lindenmuth (opponent retired on stool). Munguilla (8-2, 0% KO) counters with jabs and footwork (evades 55%), per her September UD over Pineiro (outlanded 185-160). Edge: Sibrian’s aggression overwhelms in trenches, but Munguilla’s January blueprint (lateral movement) frustrates rushes—watch for clinch breaks.
Volume vs. Durability: Munguilla’s 55 punches/round wore down Sibrian last time (UD scores 77-75 x2, 79-73); Sibrian absorbed but landed harder (42% power connect). Edge: Even—Sibrian’s chin (2 KOs conceded) holds; Munguilla’s resilience shines in decisions (8/10 career).
Stamina & Adjustments: Both go distance often (Sibrian 4/6 recent; Munguilla 10/10). Sibrian faded late in January; Munguilla stronger Rds 7-10. Edge: Munguilla for pacing, but Sibrian’s homecoming fire flips script.
Fighter Records and Standings
Brook Sibrian: 8-2-0 (4 KOs), ranked #8 WBC light flyweight. Pro since 2022; 10 fights, 53 rounds. Strengths: Explosive power, forward pressure. Weaknesses: Cardio in later rounds (trailed January).
Gloria Munguilla: 8-2-0 (0 KOs), ranked #12 WBC light flyweight. Pro since 2022; 10 fights, 53 rounds. Strengths: Technical boxing, ring IQ. Weaknesses: Lacks finishing punch; vulnerable to body work.
Rematch elevates both toward top-5 contention.
Recent Form
Sibrian: Two wins post-loss, blending power with maturity. Munguilla: Steady decisions, building on January upset.
| Last 5 Fights | Sibrian Result | Key Stat | Munguilla Result | Key Stat |
| Aug 2, 2025 vs. Katherine Renee Lindenmuth | W TKO 7 | Opponent retired; body barrage (4 knockdowns) | Sep 20, 2025 vs. Adriana Pineiro | W UD 8 |
| May 22, 2025 vs. Rubi Gutierrez | W UD 6 | 59-55 x2, 60-54; volume edge | Jun 2025 vs. Unnamed Opponent | W UD 6 |
| Jan 18, 2025 vs. Gloria Munguilla | L UD 8 | 75-77 x2, 73-79; competitive war | Jan 18, 2025 vs. Brook Sibrian | W UD 8 |
| Dec 22, 2024 vs. Issabel Vasquez | W UD 4 | Debut-level dominance | Nov 2024 vs. Unnamed | W UD 6 |
| Jun 23, 2024 vs. Carina Rojas | W UD 4 | Early career win | Earlier 2024 | W UD 4 |
Sibrian: 3-1 (1 KO) last 4; power resurgence. Munguilla: 4-0 last 4; decision queen.
Fight History
Rematch—their first clash on January 18, 2025, at Commerce Casino saw Munguilla edge a razor-close UD (77-75 x2, 79-73) in a non-title war, snapping Sibrian’s unbeaten streak amid debates over aggression scoring. No prior meetings; common foes limited (regional tune-ups). January averaged 52 punches/round—expect escalated intensity with title stakes.
FIGHT ODDS
Gloria Munguilla + 110
Brook Sibrian – 130
Odds Courtesy of Sports Odds Direct as of Friday, December 12, 2025
