Top bantamweight contenders Germaine de Randamie and Aspen Ladd will be aiming to become the next challenger for Amanda Nunes' championship when they square off in Sacramento, California, tonight.

But before de Randamie, a former UFC featherweight champ, and the 8-0 Ladd meet in the UFC Fight Night main event, there are several intriguing matchups, including the return of Hall of Famer Urijah Faber.

Here's how they're going down.

Jonathan Martinez defeated Liu Pingyuan by third-round knockout

More like Mart-knee-nez.

Liu swarmed in with a combination, Martinez took a step forward and threw a straight knee and it landed on the button -- Liu was out cold. The knockout finish came at 3:54 of the third round in a very close fight up until that point.

"I pretty much just picked my knee up," Martinez said. "I just picked it up."

Martinez (11-2) has won two straight now and four of five. The 25-year-old Texas resident is 2-1 in the UFC. Liu (15-5), a 26-year-old Chinese prospect, had won 10 in a row coming in.

Brianna Van Buren defeated Lívinha Souza by unanimous decision

"The Bull" seems like a future factor in the UFC women's strawweight division.

Van Buren dominated Souza in a battle of former Invicta FC women's strawweight champions in a clear unanimous decision (30-27, 30-27, 30-27) victory. Van Buren landed heavy combinations in all three rounds, took Souza down in the third and looked like a well-rounded threat throughout.

Afterward, Van Buren, a Gilroy, Calif., native, called for a fight on the upcoming UFC card that will likely be in San Francisco in October.

"It would be stupid if you didn't get me on that card," Van Buren said. "I want a top-10. I know I'm asking for too much, so if you can give me whoever is willing to step up and fight me, let's get the ball rolling."

Van Buren (8-2) was making her debut after winning three fights in one night to become Invicta champion in May. The 25-year-old American Kickboxing Academy product has won five straight. Souza (13-2), the 28-year-old Brazilian, had won four in a row.

Benito Lopez defeated Vince Morales by unanimous decision

Lopez's strategy was clearly centered on leg kicks. And he executed.

Despite being dropped in the first round and being peppered with combinations, Lopez did enough for a unanimous decision (29-28, 29-28, 29-28) win over Morales in a close bout. According to UFC stats, Lopez landed 36 leg kicks. Morales, meanwhile, out-landed Lopez 34-7 in strikes to the head.

Lopez (10-1) bounced back from a loss to Manny Bermudez last December with this victory. The 25-year-old Team Alpha Male product got chants of "Benito" -- he was the hometown favorite. Morales (9-4), a 28-year-old Oregon native, has lost two of three in the UFC.

Still to come:

Darren Elkins vs. Ryan Hall

Julianna Pena vs. Nicco Montano

Andre Fili vs. Sheymon Moraes

Mike Rodriguez vs. John Allan

Marvin Vettori vs. Cezar Ferreira

Karl Roberson vs. Wellington Turman

Josh Emmett vs. Mirsad Bektić

Urijah Faber vs. Ricky Simon

Germaine de Randamie vs. Aspen Ladd