It's Juan de Santos versus Cain Velasquez Saturday night at UFC 155. The action goes live at 10 p.m. ET and we have a live stream from you.

This will be a sequel of the first match that saw Dos Velasquez hit the canvas 64 seconds into the match, which led to the surrendering of his championship belt.

Many think that Velasquez had an injured knee, a bad ACL to be specific, going into that match. So a question of health has to be a concern coming into this fight.

"I've seen the fight go so many ways in my head," Velasquez said. "A TKO, a knockout, a submission, a five-round, grueling, back-and-forth kind of thing ... I'm going to take it however I can get it." 

Dos Santos, who hails from Brazil, comes into this matchup with a career 15-1 record and 9-0 in UFC matches. He has the physical advantage in height as the Tale of the Tapes present him at 6' 4". Dos Santos is only 28 years old.

In his last match he took out Frank Mir in UFC 146.

As for his opponent, Velasquez, he is 10-1 overall in mixed martial arts, while posting a 8-1 record in UFC. His last fight came against Antonio "Bigfoot" Silva also at UFC 146 and he finished that match in the first down with a TKO.

Click here to watch the live streaming action which will begin at 10 p.m. ET.

Click here to watch the undercards that begin at 8 p.m. ET.