TMZSports.com
Bo Nickal says he'll face the toughest test of his still-young MMA career Saturday when he steps into the Octagon vs. Reinier De Ridder ... a former 2-division world champ in ONE!
The 29-year-old 3x NCAA wrestling champ and undefeated MMA fighter is set to scrap with 34-year-old RDR ... and despite being the 13th-ranked Middleweight, Nickal says Ridder is actually underrated.
"I think that both of us would beat most of the top 15, and I think that this fight is way more than an unranked guy fighting number 13," Bo told TMZ Sports.