The two will meet in one of the feature bouts for what is shaping up to be a very strong fight card for the World Series of Fighting.
WSOF 11 is already topped by a main event that sees lightweight champion Justin Gaethje putting his belt on the line against Nick Newell, and a co-main event that pits Jon Fitch against Jake Shields.
The event takes place on July 5, but a venue has yet to be announced.
Guillard (31-13-2, 2 NC) is making his promotional debut at WSOF 11 following a rough past couple of years fighting under the UFC banner. While Guillard had found some success in the Octagon, he’s gone 2-5 with 1 no contest over his last eight bouts.
He’ll be looking to get out to a strong start, but faces easy task in Cavalcante.
The Brazilian fighter was once considered a perennial top ten lightweight in the world, but has also slipped over the past few years and now holds a professional record of 18-7-1 with 2 no contests.
Unlike Guillard, who is coming off of a loss to Michael Johnson in his last bout, Cavalcante most recently defeated Tyson Griffin at WSOF 4 last August.