We told you this October 2nd event was going to be the biggest event of the year, and the main event does not disappoint. There aren't many matchups that make sense these days for the P4P king Gordon Ryan, but how does another 2019 ADCC champion sound?

Read: FloGrappling No-Gi Rankings

Gordon Ryan vs Matheus Diniz

In a matchup of the 2019 ADCC champs at 88 and 99kg, this main event puts two top-ranked athletes head-to-head to decide who really is number one. The winner of this match should walk away with the P4P top spot in our No-Gi Rankings no question.

Watch: Gordon Ryan vs Kyle Boehm From WNO

This match will be under submission-only rules with a 30-minute time limit. Should no submission be attained in the 30 minutes, it will go to a judges' decision. Gordon is no doubt the heavy favorite here, as he is against almost any grappler, but Diniz should be Gordon's toughest test since the ADCC Absolute final against Buchecha in 2019.

The event will take place in Austin, Texas. There are several more high-profile matches coming in the next few days, stay tuned to FloGrappling.com and our social media for updates!

Watch WNO: Gordon Ryan vs Matheus Diniz Live On Demand On FloGrappling