Ryosuke Nishida proved to be the physically larger man at the weigh-in, edging out his opponent despite entering as the naturally heavier 118-pound class fighter. Nishida, a former IBF bantamweight champion, came in just under the 122-pound limit for his showdown with Mexico City’s Bryan Mercado, who appeared noticeably lighter on Sunday’s official weigh-in. Nishida weighed in at 121.9 pounds, while Mercado checked in at 120.8 pounds — Mercado’s lightest weight in more than a decade — ahead of their IBF junior featherweight title eliminator.
The bout will be streamed exclusively in Japan by U-Next from the Sumiyoshi Sports Center in Nishida’s hometown of Osaka.
Mercado, boasting a 32-1 record with 26 knockouts, is stepping into Sunday’s fight at his lightest since his second professional bout — an ironic contrast as that early loss remains his only career defeat. The 30-year-old Mexico City native has since reeled off 31 straight wins, including 11 knockouts in his last 12 victories.
In contrast, Nishida, now 10-1 with 2 KOs, traveled up in weight for this clash, marking his heaviest weigh-in in over five years. He has spent much of his career at bantamweight, where he captured the IBF title by defeating Emmanuel Rodríguez on points in May 2024. After one successful defense, he suffered a sixth-round stoppage at the hands of his countryman Junto Nakatani in a WBC/IBF unification bout last June at Ariake Colosseum in Tokyo.
That bout signaled the end of Nishida’s bantamweight era for both fighters. Nakatani moved up to 122 pounds last December, narrowly defeating the previously undefeated Sebastian Hernandez in Riyadh as part of Riyadh Season’s Japan vs. the World program, which also featured Naoya Inoue defending his undisputed 122-pound title against Alan David Picasso.
Current plans call for Inoue and Nakatani to face off on May 2, though an official date hadn’t been announced at the time this report was prepared.
Whichever man triumphs on Sunday will become the IBF mandatory challenger to the victor of the Inoue-Nakatani showdown, setting up what many expect could be the biggest clash in Japanese boxing history.
Jake Donovan is an award-winning journalist who has served BoxingScene as a senior writer from 2007 to 2024, and as news editor for the last nine years of his first stint. He previously led writing for The Ring before returning home. Follow Jake on X (https://x.com/JakeBScene) and Instagram (https://www.instagram.com/jakendabox_).
