Tomorrow night two UFC Heavyweight champions enter the octagon but at the end of the night there can be only one. Current UFC Heavyweight champion Cain Velasquez makes his return to the octagon after being on the shelf to unify the UFC Heavyweight title as he squares off against interim champion Fabricio Werdum in Mexico City but before they square off they have to make weight and there are sure to be fireworks! Watch the weigh-ins here at 7 PM ET/ 4 PM PT .

Here is the fight card for tomorrow night:

UFC 188 PPV 10 p.m. ET

Cain Velasquez  vs. Fabricio Werdum

Eddie Alvarez  vs. Gilbert Melendez

Kelvin Gastelum  vs. Nate Marquardt

Yair Rodriguez  vs. Charles Rosa

Angela Hill  vs. Tecia Torres


UFC 188 Prelims on FX, 8 p.m. ET

Chico Camus  vs. Henry Cejudo

Drew Dober  vs. Efrain Escudero

Alejandro Perez  vs. Patrick Williams

Johnny Case  vs. Francisco Trevino


UFC Fight Pass 7 p.m. ET

Augusto Montano vs. Cathal Pendred

Gabriel Benitez  vs. Clay Collard