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Some fights are just fights. Then there are fights that define the sport — battles so extraordinary in their competitiveness, their stakes, or their sheer drama that they become touchstones for every MMA fan. This list covers 10 of the most important and best fights in UFC history, ranked not purely by technical quality but by their impact on the sport and the memories they created.

1. Forrest Griffin vs. Stephan Bonnar — TUF 1 Finale (2005)

The single most important fight in UFC history. The finale of The Ultimate Fighter Season 1, broadcast on Spike TV, showed a mass audience what MMA could be. Griffin and Bonnar threw everything they had for three rounds — neither man backing down, both constantly moving forward, blood everywhere. Dana White was so moved that he signed both men to UFC contracts even though only the winner was supposed to receive a contract. The fight saved the UFC as a business. Without it, the organization may not have survived.

2. Dan Henderson vs. Mauricio “Shogun” Rua 1 (2011)

Many consider this the best MMA fight ever fought. Two elite light heavyweights — both former Pride FC stars — went to war for five rounds of relentless action. Henderson dropped Rua with the H-Bomb right hand in the first round and Rua looked finished. Rua came back, dropped Henderson, and the fight evolved into five rounds of incredible exchanges, near-finishes, and impossible toughness. Rua won by split decision, but both men were forever elevated by their performance.

3. Conor McGregor vs. Nate Diaz 2 (2016)

The first fight saw McGregor submitted in the second round, shocking the MMA world. The rematch at UFC 202 was one of the highest-selling UFC PPVs ever. Both men were hurt multiple times across five rounds of back-and-forth action. McGregor’s striking versus Diaz’s boxing and BJJ created a fascinating, chaotic fight that McGregor ultimately won by majority decision. The combination of star power and fight quality made it one of the most-watched events in UFC history.

4. Robbie Lawler vs. Rory MacDonald 2 (2015)

UFC 189 was a legendary card, and its welterweight title fight was extraordinary. MacDonald fought brilliantly for three rounds, bloodying Lawler’s face and controlling the fight with his jab. In the fourth round, Lawler landed a right hand that fractured MacDonald’s nose catastrophically — his face literally caved in. MacDonald refused to stop and continued fighting before the doctor eventually stopped it. The images of MacDonald’s destroyed face, and his subsequent corner stoppage, are indelible in UFC history.

5. Max Holloway vs. Dustin Poirier 1 (2019) / Holloway vs. Brian Ortega (2018)

Max Holloway has been involved in more top-tier fights than almost any fighter of his generation. His fights with Dustin Poirier (dominant performance over five rounds) and Brian Ortega (came back from near-submission multiple times) showed a fighter who combines technical skill with extraordinary toughness. Any Holloway fight from his title reign belongs in a conversation about the best UFC performances.

6. Dustin Poirier vs. Dan Hooker (2020)

During the early COVID pandemic period when the UFC was fighting on Fight Island, this lightweight bout was a contender for best fight of the year. Both men landed enormous shots throughout five rounds. Hooker hit Poirier with shots that would have finished most fighters; Poirier came back and eventually won by unanimous decision. The technical quality of the striking and the pace of the fight made it an immediate classic.

7. Anderson Silva vs. Chael Sonnen 1 (2010)

Sonnen dominated the first four and a half rounds, wrestling Silva into submission and landing ground-and-pound at will. Silva was losing badly. Then, with under two minutes left in the fifth round, Silva locked in a triangle choke from his back that forced Sonnen to tap. The reversal is one of MMA’s most miraculous moments and added enormous mythology to Silva’s championship reign.

8. Jon Jones vs. Alexander Gustafsson 1 (2013)

Through most of Jones’s title reign, he had won convincingly but not always in thrilling fashion. Then Gustafsson pushed him to the limit for five rounds, winning the second and third rounds convincingly and making the fight genuinely in doubt. Jones survived and won by unanimous decision, but his vulnerability in this fight added human dimensions to an otherwise superhuman performance record.

9. Edson Barboza vs. Kevin Lee (2018)

A lightweight fight that few casual fans remember but hardcore MMA fans treasure. Barboza and Lee produced an extraordinary round of technical striking and grappling exchanges, with momentum swinging multiple times before Lee won by submission. The technical level of the striking — particularly the kicks and clinch work — was as high as any lightweight fight before or since.

10. Tony Ferguson vs. Donald “Cowboy” Cerrone (2017)

Both men were near the peak of their careers and the fight delivered a chaotic, violent classic. Ferguson’s unorthodox striking and grappling combinations against Cerrone’s craftsmanship produced something genuinely unusual — a fight that was technically interesting and wildly exciting simultaneously. Ferguson stopped Cerrone in the second round in one of the year’s best performances.

Honorable Mentions

The UFC’s catalog of great fights is enormous. Other fights that belong in any honest conversation include: Chuck Liddell vs. Randy Couture 1 (2004), Frankie Edgar vs. BJ Penn 1 (2010), Joanna Jedrzejczyk vs. Claudia Gadelha 2 (2016), Amanda Nunes vs. Valentina Shevchenko 1 (2017), and virtually any Robbie Lawler title fight from 2014-2016. The organization has produced extraordinary fights across its entire history, and new classics are written regularly.