5 incredible UFC vs. ONE Championship fights we'd like to see

#4. Rose Namajunas (UFC) vs. Angela Lee (ONE)

Rose Namajunas has emerged as one of the most interesting and likable fighters on the UFC roster in recent years. The reigning strawweight champion's unassuming and gentle nature outside the cage, coupled with her terrifying intensity inside the octagon, makes her an incredibly intriguing fighter.

Namajunas broke onto the scene as a contestant on season 20 of The Ultimate Fighter, submitting all of her opponents on her way to the finale. She came into the UFC with a high-level Brazilian jiu-jitsu background and, following her alliance with legendary striking coach Trevor Wittman, has become one of the most well-rounded fighters in the promotion.

Proof of her obvious improvements in the stand-up realm is in the fact that Namajunas has secured stunning first-round knockout victories against seasoned strikers like Joanna Jędrzejczyk and Zhang Weili. At just 29, she is already the champion of the most competitive division in all of women’s MMA.

Watch a compilation of Rose Namajunas' finishes below:

Angela Lee is arguably the best female mixed martial artist outside of the UFC. The reigning ONE atomweight champion looks set to reign over her division for a long time to come, already having beaten most of the top contenders.

Lee possesses elite Brazilian jiu-jitsu. Out of her 10 career wins, seven have come by way of submission. She became a ONE champion at just 18 and has stayed atop the 115-pound division for a very long time. At just 25, this prodigy has a very bright future ahead of her.

Both Angela Lee and Rose Namajunas are well-rounded and highly intelligent fighters. They have very similar skillsets and the grappling exchanges between the two submission artists would be a sight to behold. Additionally, both fighters have that championship mentality that sets them apart from the rest of the women in their respective divisions.

Watch a compilation of Angela Lee's best performances in ONE Championship below:

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#3. Deiveson Figueiredo (UFC) vs. Joshua Pacio (ONE)

Who is the best 125-pound fighter in the world?

The question as to which fighter is the best in their weight class is a tricky one. While the UFC is undoubtedly the biggest MMA promotion, that doesn't mean they have ALL the best fighters on the planet. Top promotions like Bellator and ONE Championship have been slowly but surely improving the quality of their rosters in recent years and can finally hold a candle to the Dana White-led promotion.

With regards to the 125-pound weight class, a division that Bellator doesn't have, the title of the best fighter in the world befits either the UFC flyweight champion or ONE's strawweight champion.

Deiveson Figueiredo is the reigning UFC flyweight king. The Brazilian is huge for the weight class and possesses legitimate one-punch knockout power, a rare asset for a 125-pound fighter. 'Deus da Guerra' boasts an excellent professional record of 21-2 and is very well-rounded. Out of his 21 career wins, nine have come by way of KO/TKO and eight by submission.

Figueiredo's 125-pound ONE Championship counterpart has a very similar skillset and record. Joshua Pacio, the ONE strawweight champion, has a 20-3 record and is one of the longest reigning champions in the promotion. Having already defended his title twice, the 26-year-old will stay atop the division for a long time to come if he continues to improve.

Pacio and Figueiredo are so evenly matched. Even their knockout to submission ratio is uncannily similar. 'The Passion' has eight wins by way of KO/TKO and nine via submission.

Check out Joshua Pacio's incredible highlight reel below:

The only difference between the two 125-pounders is their age. Deiveson Figueiredo is eight years older than Joshua Pacio and could struggle against the speed of the Filipino fighter. On the flipside, Figueiredo is undoubtedly more powerful than Pacio and will likely have a strength advantage. All things considered, it's a very intriguing matchup.