Gonzaga knocking out Crocop in his debut was a huge upset. Crocop at the time was seen as #2 P4P in all of MMA behind Fedor.

Dana hates wrapping that belt around Stricklands waist 🤣

The Leon KO was fucking crazy. Everyone was literally falling asleep & then everyone went absolutely nuts 😭😂

Man, these were all "Holy SHIT" moments, I remember them all.. What a journey, I love this sport!!!

Me and all my friends were so upset when gsp got knocked out we just said fuck it and everyone went home early 🤣

Dricus vs Whittaker was crazy at the time

Discovered UFC one night when I was sick. It was the TUF Season 1 Finale. Amazing. Watched for a couple years, then stopped. Buddies invited me out to go see a fight a couple years back after my long hiatus - it was Rousey v Holm.

Matt Serra TKO'ing GSP was fkn nuts. I remember tripping out when it happened

how is Frankie Edgar not on here?? his wins against BJ Penn were legendary

Holloway Vs Gaethje is a good honorable mention fr. Everyone counted max out before that fight and turned out to be KOTY in his favor.

Dc really tried to say that Izzy be Strickland was a close fight 😂😂😂

No DDP and Robert biased company lol I'm surprised Jon Jones isn't here for a oiling up

My favorite upset will ALWAYS be Chuck Liddell vs Rashad. I been watching UFC since you had to rent it on VHS next to the faces of death videos so the new fans won't know that era.

That fight between connor and nate must of been completely insane in the stadium towards the end

All 3 judges scoring 49-46 for Strickland shows you how dominant that fight was

1:16 - 😂 the guy in the background: 😁

I’ve witnessed all of these live, tv ofc, but man each one definitely was shocking af. So many legends and big names in these It’s crazy to see how far the ufc has come

That Sylvia knock out looked like his powers just got taken away out of nowhere.

Matt Sera over GSP & J Pena over A Nunes. This next one won't be on many people's lists but after Cody Garbrandt beat D Cruz he looked unbeatable so Dillashaw defeating Cody was an upset for me, obviously I was naive in Cody's overall mental & physical abilities- I even thought he would win the 2nd fight!! I know... I know 🤷‍♂️ 🤦‍♂️

I love the energy you can feel when it hits for them that they really just did that

Nunes vs Peña 1 was crazy watching it live

That's why Leon Edwards has the most aesthetic physique

Joe Lauzon over Jens Pulver

Serra beating GSP, Peña beating Nunes were insane

My Top 10 Upsets in UFC 1. Aldo vs Conor 2. Anderson Silva vs Weidman 3. Alex Pereira vs Adesanya 4. Ronda vs Holm 5. Cro-Cop vs Gabriel 6. Shogun vs Jon 7. Cruz vs Cody 8. Ciryl vs Jon 9. Conor vs Nate 10. Cyborg vs Amanda

Leon definitely up there man was on a beatdown to that head-kick boom GAME OVER!!

4:56 “rock luked”😂

Forrest over Shogun, and Conor over Aldo should've been on there

It’s 100% Serra beating GSP. Serra didn’t really do anything before that or anything after that. Weidman defended his title a couple of times. Holly was a champion boxer and also continued to have success afterward. Nate had also fought for a title previously and was bigger than Conor

Nate smacking Conor's head to adjust it for the girp is funny af. Badass MFs these brothers are I tell you.

Grasso schevchenko takes the cake mos defs

Where tf is Frankie vs bj penn 1?

Dominick Reyes vs John Jones

Gonzaga vs Cro Cop BJ Penn vs Matt Hughes

6:54 tf the ref doing 😂

Man, the MMA on point guys need to narrate this 😂

The Leon one gives me chills EVERYTIME

Thanks for the video, UFC

Damn they put mcgregor as the first frame being choked out. Dana and mcgregor must be fighting

How ironic is it, Adesanya barked at Sean before the fight started and proceeded to get dogged on for 5 rounds😂

for No. 3 : I M NOT SUPRISED MF

Some of these fights shouldn't even be considered upsets: 1. Holm +820 vs. Rousey 2. Dillashaw +710 vs. Barao 3. Julianna Pena +700 vs. Amanda Nunes 4. Grasso +580 vs. Shevchenko 5. Bisping +550 vs. Rockhold 6. Strickland +540 vs. Adesanya 7. Matt Serra +345 vs. GSP 8. Nate Diaz +340 vs. McGregor 9. Leon Edwards +280 vs. Usman 10. Chris Weidman +210 vs. Silva

The leon one is the best for me out of all these.

Matt vs gsp should have been lower on the list imo. But decent list regardless

Izzy and Alex should be number 1

Serra vs GSP 1 will always be in my top 5.

Some of the best underdogs 🔥

Was expecting Holm-Rousey

Only 2 of them were able to avenge those losses in stunning fashion

A Silva vs C Weidman is a great example of "F around & find out!!" 😂

The way John McCarthy stopped Bisping on his track by just putting his hands on him is fucking funny 😂. Dude is a beast.

Uzbekistan 🇺🇿 ❤

UFC knows what fan wants badly... thanks for the vid

Amanda upset number 1

Cody “No Love” Garbrandt’s win over Dominick Cruz is as close to being a Masterpiece as I’ve seen. He hasn’t gotten close, since. But that one was something special.

Leon vs Usman for sure

anderson silva losing to chris weidman pissed me off back in the day. matt serra gsp first fight is the biggest upset of all time

Strickland the only highlight to go to a decision.... No surprise there

Best underdog win was stipe ngannou 1

2:00 - Never realized only one ground & pound punch landed

Anderson 'Milkman beater' Silva is highly overrated. He just got exposed later in his carrer. Him getting KO'd was no upset. This type of showboating only worked against bus drivers and plumbers. 2nd generation fighters exposed him. His only good wins were vitor and henderson.

Matt Serra and Chris Weidman 🔥🔥

A mild challenge at best.

Adasanya has a chin,taking all those punches 👊 from Strickland

Besides that adensanya fight strickland boring as hell lol

Ronda vs holly holm top 3 for me

It's 6am ufc

I'm fine with the rest, but Holm beating Rousey was only an upset if you know nothing about striking. I won a lot of money that night! 😂 I also had Nate to beat Conor, but I'm happy for that to be classed as an upset. Holm beating Rousey seemed so obvious to me.

if we can count strikeforce then not having werdum vs fedor here is criminal, plus we had cruz vs Cody and Rose vs Andrade

Strickland won me a small fortune. That'll forever be my favorite moment.

Chris is the man.

Conor roast continues

My goat😢🐐

Ddp vs Whitaker and Stephens vs rda,

DONT PUT JUICED UP DILLASHAW IN THESE EVER AGAIN

All time favourite nate choking out conor and alexa grasso choking out valentina 💯🔥🔥

Now this is a video!😊❤

topuria vs volk should've been here

I miss Killashaw... such a beast.

You need to make one about bad judges on decisions. Like strickland losing to du plessis, gustaffson and Reyes losing to Jones. There's so many of them but those are the ones that stand out the most to me right now.

What editing software was used to create the effects in this video?

If UFC ever decides to do a female BMF title fight, it should be Joanna Jędrzejczyk vs Miesha Tate.😎

The Anderson Silva was it for me. Wideman was so bad in that fight that Silva was f**king around. And then to see him celebrating at the end after that performance got me so mad. Well it’s Silva’s fault, but still… he was to good for his own good LOL Ps: tell me your favourite is not the Luke Rockhold one 😂

Strickland, Leon super

Sean strickland

I don't understand how Michael winning over Luke is a upset. Michael is awesome

Conor vs aldo should be on here no one thought Conor was going to win

Whether you look at it in the present day while it happened or in hindsight Matt Serra is and likely will always be the biggest upset the UFC has seen because of how the UFCs format has changed. A Championship fighter wouldnt even get the chance to replicate that nowdays and even if they did it would still be almost impossible to top considering the complete domince the win was w/out having a one punch KO. He literally beat the GOAT at the time and still arguably the goat to this day in dominating fashion everywhere like he, Matt himself, was the GOAT that day giving out lessons to one of the most supreme fighters the sport has seen. The other ones were pretty amazin also but moreso on the storylines, reactions and how it happened and many if not all fell off after defeats for whatever reason. Js

Based on rankings, odds and skill/timing of the matchups, some of these fights are BARELY upsets. A #2 or 3 contender beating a champ shouldn't even be on this list. GSP was the greatest WW, and perhaps the P4P king - and is still in the conversation as such - when an unranked Matt Serra - who only got the title shot because he won a narrow split decision on TUF to earn his way back into the UFC - KO'd him in the first round. That was easily the biggest upset on this list and perhaps ever.

Weidman beating Silva was the biggest upset i had seen. He beat literally beat prime silva who was unbeaten for 7-8 years..!

Rocky's🏆🏆🏆🏆🔥🔥🔥

Holly vs Rousey wasn’t an upset, it was spectacular

How was diaz conor 1 an upset? Conor moved up 2 weight classes fw to ww😂

Matt Serras upset against GSP is most likely the cause the GSP's alien stories

Where is Amanda V/S Juliana 😮

Every underdog here gets massive props aside for Pena. She gets zero respect for her decisive upset. Nunes "was sick" and "under-prepared". Sure she won the rematch in dominant fasion, but it doesn't take away from the upset.

If Sean had jumped on easy's back in that first round while he had him down, he could have ground and pound him out or choked him out and been done with it. But we all know how Sean is. He wanted to fight for 5 rounds and dominate izzy😂

UPSET: TOPURIA VS VOLKA

When Leon KO’d usman I’m not sure I’d consider that an upset I was pumped

No Colby/Leon ?