The substitution in the middleweight matchup was reported by informed sources close to the situation.
Abusupiyan Magomedov, 33, had two fights in the UFC, finishing Dustin Stoltzfus by first-round TKO and then losing by second-round TKO to future division champion Sean Strickland.
Caio Borrallo, 30, has four wins in the World’s Strongest League, finishing Michal Oleksijchuk by rear-naked choke in the second round in his last fight. Prior to that, the Brazilian knocked out Gadzhi Omargadzhiev, and won unanimous decisions over Armen Petrosyan and Mahmud Muradov.