Tuff-N-Uff 156 returns to the Las Vegas Strip
Tuff-N-Uff heads back to SAHARA Las Vegas on August 19 with championship stakes and a pair of intriguing lightweight matchups. Tuff-N-Uff 156 marks the promotion’s first event at The Theatre inside SAHARA since June 2025 and its sixth show of 2026.
The card is topped by a flyweight championship matchup between Rainn Guerrero and Paula Cristina. Guerrero enters at 9-2 with four wins from her last five fights, while the Brazilian challenger brings an 8-3 record and considerable finishing danger.
Rainn Guerrero faces dangerous Paula Cristina for flyweight gold
Guerrero vs. Cristina puts two experienced flyweights together with a championship on the line. Guerrero has built momentum through a strong recent run, but Cristina has shown she can erase an opponent quickly when she finds her range.
That power was on display at Shooto Brazil 134, where Cristina scored a destructive first-round TKO. The performance offered a useful reminder of what Guerrero will have to manage if the title fight turns into prolonged striking exchanges.
She just demolished her 💣
— UFC FIGHT PASS (@UFCFightPass) December 6, 2025
Paula Bittencourt gets the first round TKO
[ #ShootoBrazil134 | LIVE on UFC Fight Pass ] pic.twitter.com/K6lWU62bgm
Callum Mullen makes his American debut against Ashton Charlton
Another major storyline is the arrival of British lightweight Callum Mullen. The 12-3 prospect makes his first appearance in the United States against Ashton Charlton, an experienced American carrying a 9-4 record.
Mullen vs. Charlton gives Mullen the chance to introduce himself to a new audience after winning five consecutive fights. Charlton has alternated wins and losses recently, but his experience makes him a useful measuring stick for a visiting fighter looking to make an immediate impression in Las Vegas.
Interesting signature for Vegas based Tuff'N'Uff as they are bringing in 🏴Callum Mullen (12-3) for his American debut. He'll take on 🇺🇸Ashton Charlton (9-4) at LW.
— The Matchmaker (@MMA__Matchmaker) August 5, 2026
The event is headlined by 🇧🇷Paula Bittencourt (8-3) vs 🇺🇸Rainn Guerrero (9-2) on August 19th.#TNU156 #MMA pic.twitter.com/JrJfGK4Uub
David Goldenberg puts unbeaten record against Kai Martin
The third professional matchup pairs undefeated David Goldenberg with Kai Martin. Goldenberg has opened his career at 3-0, while Martin enters at 3-1.
Goldenberg vs. Martin is a straightforward prospect test: one fighter tries to preserve a perfect record, while the other has an opportunity to hand him his first professional defeat.
Tuff-N-Uff 156 full fight card
Flyweight Championship
Rainn Guerrero vs. Paula Cristina
Lightweight
Callum Mullen vs. Ashton Charlton
Lightweight
David Goldenberg vs. Kai Martin
Tuff-N-Uff 156 FAQ
When is Tuff-N-Uff 156?
Tuff-N-Uff 156 takes place on August 19, 2026 in Las Vegas, Nevada.
Where is Tuff-N-Uff 156 taking place?
The event is being held at The Theatre inside SAHARA Las Vegas on the Las Vegas Strip.
Who is fighting for the Tuff-N-Uff flyweight title?
Rainn Guerrero faces Paula Cristina for the flyweight championship.
Who is Callum Mullen fighting at Tuff-N-Uff 156?
Mullen faces Ashton Charlton in a professional lightweight bout.
Is Tuff-N-Uff 156 Callum Mullen's American debut?
Yes. Callum Mullen is scheduled to make his United States debut at Tuff-N-Uff 156.
Is David Goldenberg undefeated?
Yes. David Goldenberg enters his fight with Kai Martin holding a 3-0 professional MMA record.
How can fans watch Tuff-N-Uff 156?
Tuff-N-Uff 156 is scheduled to stream live worldwide on UFC Fight Pass.