Mayweather vs Tenshin will headline a show put on by Japanese MMA promotional outfit RIZIN, and the undercard will feature a number of MMA contests. Where can I watch Mayweather vs Tenshin? The fight will be available to viewers via FITE TV online pay-per-view. Is Mayweather vs Tenshin on UK TV or US TV? No, there are no broadcast deals agreed for the fight to be shown on television in the UK or US. The only way for international viewers to legally watch the RIZIN 14 card is through the FITE TV online pay-per-view mentioned above, although this still won’t show Mayweather’s bout for those in the US. When is Mayweather vs Tenshin? The fight will take place on New Year’s Eve – Monday December 31, 2018. MAYWEATHER VS. TENSHIN – WHEN, WHERE, AND HOW Here are all the details of Rizin 14 in terms of place, time, and the channels broadcasting the event. Where: Saitama Super Arena in Saitama, Japan. Channels: Fuji TV and Fite TV. What time will Mayweather vs Tenshin start? RIZIN have made public that their full card will begin at 6am UK time on December 31, but it is not clear what time the main event is expected. The full show has 14 fights in total, with Mayweather vs Tenshin obviously the final two competitors to make their entrance. Various estimates have speculated that they could ring walk any time between 10am and 1pm UK time. Where is Mayweather vs Tenshin taking place? The fight is taking place at the 37,000 capacity Saitama Super Arena, just outside of Tokyo, Japan.