Munguia and Espinoza defend titles on Riyadh undercard before Canelo-Mbilli

Two titles before the main event

The Riyadh card on Saturday, October 31, 2026, is built as Mexico against the world, and its two undercard title fights carry real championship stakes of their own. At The Venue in Riyadh — listed as Kingdom Arena in some event listings — Jaime Munguia defends his WBA super-middleweight title against undefeated Nikita Zon in the co-feature, while Rafael Espinoza defends his WBO featherweight title against Ricardo Blandon. Both bouts are scheduled for 12 rounds, and both champions made weight on Friday, October 30.

These are not showcase bouts added to fill time. Munguia is making the first defence of a title he won in a one-sided unanimous decision over fellow Mexican Armando Resendiz, according to FightNews, and Espinoza is making the fifth defence of his WBO crown, according to FightMag. For the challengers, the occasion is different in kind: a first world-title opportunity, on a major pay-per-view card, against an established champion.

Munguia against Zon: experience against the unbeaten record

Jaime Munguia, 46-2 with 35 knockouts, arrives as the known quantity at super middleweight. The Tijuana fighter has spent years at or near world level and has already faced Saul “Canelo” Alvarez, losing to him in Las Vegas in May 2024. He knows the pace and pressure of a big fight weekend. Zon does not, at least not yet.

Nikita Zon, 12-0-1 with 10 knockouts, brings a more straightforward threat: an undefeated record and genuine punching power. His last fight ended with a fifth-round stoppage of Nahuel Garcia, and most of his wins have come inside the distance. What he has not done is equally important. Reports from fight week note that Zon has never boxed beyond eight rounds, and that Saturday will be his first scheduled 12-round fight. That is a substantial jump in distance and class.

At the weigh-in, Munguia scaled 167.4 pounds and Zon 167.5 pounds, both inside the 168-pound limit. There was no weight drama to distract from the boxing questions. Can Zon impose himself early, before Munguia settles into the rhythm that has carried him through long fights? Can Munguia take the challenger into rounds he has never visited, and test whether power alone travels that far?

For Munguia, a convincing first defence keeps him firmly in the conversation at 168 pounds. For Zon, the calculation is simpler and riskier: he has little to lose in reputation by challenging a champion, and everything to gain by ending Munguia's reign at the first defence.

Espinoza against Blandon: height, power and a late change

Rafael Espinoza, 28-0 with 24 knockouts, is the most physically striking champion on the card. The Guadalajara featherweight stands 6 feet 1 inch tall, an unusual frame at 126 pounds, and he has used that reach and leverage to stop most of his opponents. His most recent outing, an 11th-round technical decision over Arnold Khegai, underlined both his power and his willingness to go deep into a fight. This is his fifth defence, against a challenger stepping up in class.

Ricardo Blandon, 21-6 with 14 knockouts, of Nicaragua, is a late replacement. Espinoza was originally scheduled to face Lorenzo Parra, but Blandon now takes the opportunity after that matchup changed during fight week. Blandon enters on a run of four wins, most recently a second-round knockout of Elias Vega, according to FightNews. That form gives him momentum, but it does not erase the step up to an unbeaten world champion.

The weigh-in again told a clean story. Espinoza scaled 125.8 pounds and Blandon hit the featherweight limit exactly at 126 pounds. The contrast in the ring will be the story instead: Espinoza's height and long punching against Blandon's need to close distance, work inside and disrupt a champion accustomed to controlling range.

Late replacements can unsettle a champion who prepared for a different style, and Espinoza's camp will have had to adjust at short notice. That cuts both ways, however. Blandon has also had limited time to prepare for a specific champion, and he must solve Espinoza's size and power without a full camp built around him. The champion's experience in title fights, including going into the championship rounds, is a real advantage if the bout extends beyond the early exchanges.

What the weigh-in settled, and what it did not

Friday's scales settled eligibility, not outcomes. All four men in the two title fights made weight, with no reported weight misses across the full card. That matters after a fight week in which the card itself changed, with Munguia against Zon elevated into the chief-support position. The final picture is clearer now: two title fights, both champions defending, both challengers with a first chance at a world belt.

What the weigh-in could not settle is durability. Zon must show he can fight effectively for 12 rounds against a former world-level operator. Blandon must show he can handle Espinoza's size, reach and finishing power over the same distance. Those are not criticisms of either challenger; they are the precise reasons title fights are compelling. An unbeaten record and a winning run are credentials, but a championship fight tests them in a way no previous bout has.

How to watch

The card streams live on DAZN pay-per-view, with coverage beginning at 1 p.m. ET. The two title fights precede the main event, for which ringwalks are listed at approximately 4:30 p.m. ET. By the time the headline fighters walk, Munguia and Espinoza will already have either defended their titles or lost them, and the super-middleweight and featherweight pictures will look different on Sunday morning than they did on Friday.