Simsri vs Mendoza

Who won Simsri vs Mendoza?

Thanongsak Simsri beat Sergio Mendoza by knockout in the 2nd round on Monday, April 13th, 2026, at Korakuen Hall, Tokyo.

The fight was scheduled to take place over 12 rounds in the Jr Flyweight division, which meant the weight limit was 108 pounds (7.7 stone or 49 kg).

This contest was for the IBF jr flyweight championship of the world.

Simsri was making his 2nd defense of the IBF World Junior Flyweight Championship. He won this belt against Christian Araneta in June 2025. He had held this belt for 10 months and 8 days.

Simsri vs Mendoza stats

Thanongsak Simsri stepped into the ring with a record of 39 wins, 1 loss, and 0 draws.

Sergio Mendoza made his way to the ring with an unblemished record of 27 wins and 0 draws.

Thanongsak Simsri was the younger man by 1 year, at 25 years old.

Both Thanongsak Simsri and Sergio Mendoza fought out of an orthodox stance.

Simsri was the more experienced professional fighter, having had 13 more fights, and made his debut in 2018, 6 months earlier than Mendoza, whose first professional fight was in 2018. He had fought 30 more professional rounds, totaling 145 compared to Mendoza's 115.

Sergio Mendoza was ranked number 1 by the IBF in the 108lb division.

Activity check

In terms of activity leading into the fight, Thanongsak Simsri had been fighting more than Sergio Mendoza.

Going into this contest, Thanongsak Simsri had last fought 9 months and 25 days ago, while Sergio Mendoza's last outing had been 4 months and 22 days ago.

Simsri's last 2 fights had come over a period of 1 year, 3 months and 29 days, which means he had been fighting approximately every 7 months and 30 days. In those fights, he fought a total of 24 rounds, meaning that they had lasted 12 rounds on average.

Mendoza's last 2 fights had come over a period of 1 year and 7 months, meaning he had been fighting on average every 9 months and 15 days. In those fights, he fought a total of 6 rounds, meaning that they had lasted 3 rounds on average.

What time did Simsri vs Mendoza start?

The fighters were expected to ringwalk at around 11:00 AM UTC at Korakuen Hall, Tokyo, Japan, which was 7:00 AM EST or 4:00 AM PST on the West Coast of America, or 12:00 PM BST in the UK.

What were the odds on Simsri vs Mendoza?

Thanongsak Simsri was a 9/4 (+230) underdog going into the contest, while Sergio Mendoza made his way into the ring at 1/3 (-300) with oddsmakers.