According to the report it's unclear where, or when, the bout will take place though both sides are expected to try and make a real effort to get their man a home advantage and get the bout sorted before the end of the year. For Yamamoto's team the likely option would be December 31st as part of the TBS card set to be headlined by Kazuto Ioka whilst things are less clear in regards to hosting the bout in Argentina.
The 40 year old former 2-weight world champion turns 41 in October and will know that a loss could well spell the end of his legendary career, which has seen him rack up more than 20 world title defenses. He will however be eager to avoid a return to Japan, where he suffered a notable 2nd round blow out loss to Naoya Inoue back in late 2014. The loss to Inoue is the only stoppage Narvaez has ever suffered and helped turned Inoue into an international star.
As for Yamamoto he scored his biggest win last year, when he scored a 7th round KO win over Yu Kawaguchi to claim the OPBF Bantamweight title, and avenge a prior loss to Kawaguchi. Since winning the title he has defended it twice stopping both Yuki Strong Kobayashi and Rex Wao. Although unknown outside of Japan he is a big puncher and a well sized Bantamweight who should have significant size advantage over Narvaez, who is a blown up Flyweight.
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