“The Monster” Naoya Inoue faces Ramon Cardenas on Sunday, May 4, live from T-Mobile Arena in Las Vegas. The pair battle it out in the main event, with the undisputed super bantamweight title on the line. The contest rounds out three days of world-class boxing action on Cinco De Mayo weekend.
Japan’s 32-year-old four-division champion Inoue (29-0, 26 KOs) makes the fourth defense of his title in his first fight in the U.S. in four years. 29-year-old Cardenas (26-1, 14 KOs) of San Antonio, TX, challenges for the division’s major title in his first championship showdown. The bout is scheduled for 12 rounds.
The 12-round co-feature pits Mexico’s Rafael Espinoza (26-0, 22 KOs) against Edward Vazquez (17-2, 4 KOs) of Fort Worth, TX. Unbeaten 31-year-old Espinoza brings his WBO featherweight belt to the ring, making the third defense of his title. Riding a two-fight winning streak, 29-year-old Vazquez makes his second attempt to become champion after dropping a majority decision to Joe Cordina in November 2023.
Among the Inoue vs Cardenas undercard bouts, Rohan Polanco (15-0, 10 KOs) of the Dominican Republic takes on Argentina’s Fabian Maidana (24-3, 18 KOs) in a 10-rounder at welterweight. Plus, Emiliano Vargas (13-0, 11 KOs) of Oxnard, CA faces Juan Leon (11-2-1, 2 KOs) of Spain in an eight-rounder at super lightweight.
Additionally, Mikito Nakano (12-0, 11 KOs) of Japan and Pedro Marquez (16-1, 10 KOs) of Puerto Rico square off in a 10-rounder at featherweight. Art Barrera Jr. (9-0, 6 KOs) of Long Beach, CA meets Chicago’s Juan Carlos Guerra Jr. (6-1-1, 2 KOs) in a six-rounder at middleweight.
Another 10-round featherweight matchup features Raeese Aleem (21-1, 12 KOs) of Muskegon, MI up against Rudy Garcia (13-1-1, 2 KOs) of Los Angeles. Patrick O’Connor of Prince George’s County, MD, makes his pro debut in a four-round cruiserweight swing bout against Tennessee’s Marcus Smith (2-1, 2 KOs).
Naoya Inoue vs Ramon Cardenas results
Get Naoya Inoue vs Ramon Cardenas full fight card results below.
Main card
- Naoya Inoue def. Ramon Cardenas by TKO (R8, 0:45) | Watch video
- Rafael Espinoza def. Edward Vazquez by TKO (R7, 1:47)
Prelims
- Rohan Polanco def. Fabian Andres Maidana by unanimous decision (100-89, 100-89, 100-89)
- Emiliano Vargas def. Juan Leon by TKO (R2, 1:40)
- Mikito Nakano def. Pedro Marquez by TKO (R4, 1:58)
- Art Barrera Jr def. Juan Carlos Guerra Jr by TKO (R6, 1:15)
- Raeese Aleem def. Rudy Garcia by unanimous decision (99-91, 98-92, 97-93)
- Patrick O’Connor vs. Marcus Smith (swing bout)
Naoya Inoue vs Ramon Cardenas live blog
Inoue vs Cardenas fight photos now live
Additional photos from the event – including Naoya Inoue vs. Ramon Cardenas, as well as the undercard action – have been published.

Video: Inoue vs Cardenas full fight highlight
The Naoya Inoue vs Ramon Cardenas full fight video highlights are now streaming.

Video: Inoue vs Cardenas post-fight press
As the action inside the boxing ring concludes, the Naoya Inoue vs Ramon Cardenas post-fight press conference follows. Fight highlights video coming soon, too.
Naoya Inoue retains undisputed 122-pound title
With the victory, Naoya Inoue (30-0, 27 KOs) of Japan makes the fourth successful defense of his undisputed super bantamweight title. Ramon Cardenas (26-1, 14 KOs), of San Antonio, TX, falls short in his first attempt to become champion.

Naoya Inoue stops Ramon Cardenas in eighth round
Naoya Inoue returns the favor, scoring a knockdown on Ramon Cardenas with a right hand in the seventh round, then dominates and stops him with a barrage of punches in the eighth.
Video: Naoya Inoue makes his ring walk
Another video published by Top Rank moments ago on YouTube features ‘The Monster’ Naoya Inoue making his first ring walk in Las Vegas in four years. Meanwhile, the Inoue vs Cardenas fight is unfolding, with some chatter on social media saying it might be the “best fight of the weekend.”
Video: Rafael Espinoza stops Edward Vazquez to retain title
The highlight video of Mexico’s Rafael Espinoza (27-0, 23 KOs) making his third successful defense of the WBO featherweight title via seventh-round TKO against Edward Vazquez (17-3, 4 KOs) of Fort Worth, TX, is now streaming on YouTube.

Cardenas drops Inoue with left hand
At the end of the second round, Ramon Cardenas sends Naoya Inoue to the canvas with a left hand. Cardenas ducked under Inoue’s left hand and countered with a left of his own.
Main event time: Naoya Inoue vs Ramon Cardenas
The main event features four-weight champion Naoya Inoue (29-0, 26 KOs) of Japan defending his undisputed super bantamweight title against Ramon Cardenas (26-1, 14 KOs) of San Antonio, TX. 32-year-old Inoue makes the fourth defense of his 122-pound title against 29-year-old Cardenas, who challenges for his first world title.

Rafael Espinoza stops Edward Vazquez in seventh round to retain title
Unbeaten Rafael Espinoza (27-0, 23 KOs) of Mexico claims a stoppage win against Edward Vazquez (17-3, 4 KOs) of Fort Worth, TX, to make the third successful defense of his WBO featherweight title. The latter falls short in his second bid to become champion, snapping his two-fight winning streak. Espinoza dominated Vazquez with a barrage of punches, which led to referee Harvey Dock stepping in to wave the fight off. The time was 1:47 into the seventh round.

Rafael Espinoza hurts Edward Vazquez in fourth round
Rafael Espinoza hurt Edward Vazquez with body shots at the end of the fourth round and continued pouring punches to the head and body. The latter was able to survive till the end of the round.
Video: Rohan Polanco dominates Fabian Maidana
The fight video highlights from a 10-round welterweight bout between Rohan Polanco and Fabian Maidana is now streaming on YouTube. Unbeaten Polanco, who scored a final-round knockdown with a body shot en route to a unanimous decision victory, improved to 16-0 with 10 KOs. Maidana dropped to 24-4 with 18 KOs, snapping his two-fight winning streak.

Co-main event: Rafael Espinoza vs Edward Vazquez
The co-main event features Rafael Espinoza (26-0, 22 KOs) of Mexico making the third defense of his WBO featherweight title against Edward Vazquez (17-2, 4 KOs) of Fort Worth, TX. The latter challenges for the title for the second time after falling short by majority decision against Joe Cordina in November 2023.

Rohan Polanco bests Fabian Maidana by decision
Rohan Polanco (16-0, 10 KOs) of the Dominican Republic defeats Fabian Maidana (24-4, 18 KOs) of Argentina by unanimous decision at welterweight. On his way to victory, Polanco scored a knockdown on Maidana with a body shot in the 10th and final round. In addition to the win, Polanco lifts the WBO Intercontinental title. All three judges scored the fight 100-89.

Up next: Rohan Polanco vs Fabian Maidana
Rounding out the Inoue vs Cardenas prelims, Rohan Polanco (15-0, 10 KOs) of the Dominican Republic goes up against Fabian Maidana (24-3, 18 KOs) of Argentina. The bout is scheduled for 10 rounds at welterweight.

Video: Emiliano Vargas dominates Juan Leon
The fight highlight video featuring Emiliano Vargas’ dominant performance against Juan Leon is now also streaming on YouTube.

Emiliano Vargas drops & stops Juan Leon in second round
Emiliano Fernando Vargas (14-0, 12 KOs) of Oxnard, CA drops Spain’s Juan Leon (11-3-1, 2 KOs) twice to claim a second-round TKO victory. Vargas sent Leon to the canvas with a right hand to the top of the head, and then again with a left uppercut. Leon managed to get back on his feet, but the referee called it a day.

Video: Art Barrera Jr. TKO's Juan Carlos Guerra Jr
Another clip on YouTube features highlight moments from the fight earlier today between Art Barrera Jr. and Juan Carlos Guerra Jr.

Video: Mikito Nakano dominates Pedro Marquez
The fight highlight video, featuring Mikito Nakano against Pedro Marquez, is now streaming on YouTube.

Up next: Emiliano Vargas vs Juan Leon
Up next on the prelims is an eight-round super lightweight bout between Emiliano Fernando Vargas (13-0, 11 KOs) of Oxnard, CA, and Juan Leon (11-2-1, 2 KOs) of Spain. Unbeaten Vargas targets his fifth win inside the distance, following a second-round stoppage of Giovannie Gonzalez in March. Riding a three-fight winning streak, Leon steps through the ropes in the U.S. for the second time, after stopping Phillip Ramer in the first round in March 2022.

Nakano drops Marquez five times en route to TKO
Mikito Nakano (13-0, 12 KOs) dominated Pedro Marquez Medina (16-2, 10 KOs) to claim a fourth-round TKO win with body shots. On his way to victory in his U.S. debut, the Japanese featherweight scored five knockdowns against his Puerto Rican opponent.

Up next: Mikito Nakano vs Pedro Marquez
The action continues with a battle between Japan and Puerto Rico, as Mikito Nakano (12-0, 11 KOs) faces Pedro Marquez Medina (16-1, 10 KOs). The matchup is scheduled for 10 rounds at featherweight. Unbeaten southpaw Nakano makes his U.S. and international debut. Once-beaten Medina aims for his 16th win in a row.

Art Barrera Jr stops Juan Carlos Guerra Jr in sixth round
Art Barrera Jr. (10-0, 7 KOs) of Lynwood, CA remains undefeated, scoring a sixth-round TKO against Juan Carlos Guerra Jr. (6-2-1, 2 KOs) of Chicago, IL. After Barrera landed another right hand, the referee stepped in and waved the middleweight fight off to save Guerra from further punishment.

Up next: Art Barrera Jr vs Juan Carlos Guerra Jr
The middleweight bout between Art Barrera Jr. (9-0, 6 KOs) of Lynwood, CA and Juan Carlos Guerra Jr. (6-1-1, 2 KOs) of Chicago, IL continues the action. The contest is scheduled for six rounds.

Raeese Aleem defeats Rudy Garcia by decision
In the event opener, Raeese Aleem (22-1, 12 KOs) of Muskegon, MI earns a unanimous decision over Rudy Garcia (13-2-1, 2 KOs) of Los Angeles, CA. After 10 rounds at featherweight, the judges scored the fight 99-91, 98-92, and 97-93.

First up: Raeese Aleem vs Rudy Garcia
Kicking off the action, Raeese Aleem (21-1, 12 KOs) of Muskegon, MI goes up against Rudy Garcia (13-1-1, 2 KOs) of Los Angeles, CA. The bout is scheduled for 10 rounds at featherweight.

Inoue vs Cardenas fight card
The Inoue vs Cardenas fight card features eight bouts in total: Seven televised matchups, including two world title clashes, and a swing bout. The action begins in less than 30 minutes.

Inoue vs Cardenas Fight Week in Photos
With the event taking place on Sunday, Inoue vs Cardenas Fight Week kicked off on Thursday with the fighters making their grand arrivals and showcasing their skills during an open workout. The final press conference took place on Friday, followed by the official weigh-ins on Saturday, one day before the fight.

Video: Inoue stops Kim in first fight of 2025
Facing off against Ramon Cardenas tonight in Las Vegas, Naoya Inoue makes his second ring appearance of the year. In his previous bout in January in Tokyo, the Japanese champion stopped Ye Joon Kim, who stepped in on short notice to replace Sam Goodman. In case you missed it, the fight highlight video is now streaming.
Ramon Cardenas' previous fight video
Tonight’s half of the main event, Ramon Cardenas, is fresh off a win by unanimous decision over Bryan Acosta in February at the Boeing Center at Tech Port in San Antonio. In case you missed it, the full video of that bout is available on YouTube. Additionally, one of the 29-year-old’s highlights goes back to September 2023, when he knocked out Rafael Pedroza in the second round at the same venue, headlining a ShoBox card. The video of that bout is also streaming on YouTube.

Naoya Inoue's previous fight in the U.S.
Stepping through the ropes tonight in Las Vegas, Naoya Inoue makes his first ring appearance in the U.S. since he fought Michael Dasmarinas in June 2021. The full video of that fight is now streaming.
Inoue vs Cardenas start time
Inoue vs Cardenas airs live on ESPN+. The start time is 10:00 PM ET / 7:00 PM PT, with the prelims starting at 6:15 PM ET / 3:15 PM PT. A VPN service, such as ExpressVPN, might be helpful to stream from a different location.