Slower round for Cruz, who must surely be feeling the pace now. Fierro backs him up in spots and manages to outwork Cruz in the exchanges. Fierro managed to create distance and keep Cruz chasing after him, smart work from Fierro.

Combination connects for Fierro, Cruz ate some big power punches there, including an uppercut. Tremendous action through six!

10-9 Fierro, 58-56 Cruz

Fierro catches Cruz coming in with an uppercut and a hook. He is trying to copy the "Rayo" Valezenuela strategy to beat Cruz by countering him on the back foot early in round 5.

Cruz attacks the body of Fierro, hoping to slow him down for the later rounds. Fierro fires back with a 4-punch combination.

Much better second half for Cruz, who ROCKS Fierro with a right hand and connects seconds later with another right cross. Monster left hook from Cruz finds a home on Fierro's chin at the end of the 5th.

10-9 Cruz, 49-46 Cruz

WHAT A ROUND!

Fierro had more success in the first two minutes of the round with some backfoot boxing with Cruz's left hook the only significant punch landed by him in that duration.

In the final minute, Cruz caught Fierro with a hard right hand, and Fierro responded immediately after with his own backhand that noticeably wobbled Cruz. Fierro sensed this was his opportunity and began to unload on Cruz, but Cruz only knows one way: trade fire with fire.

Some incredible exchanges between Cruz and Fierro in the final minute. Fierro found more success with the uppercut.

10-9 Fierro, 29-28 Cruz

Two HUGE left hooks early in round 2 from "Pitbull" Cruz; Fierro just shakes them off. 1-2 from Cruz follows, backing Fierro up; he was hurt there. Cruz is putting a beating on Fierro up to now.

Fierro almost sinks from a left hook downstairs but somehow stays on his feet to return the favor with a pair of hooks to the body just seconds later.

BIG right hand from Cruz connected on Fierro's chin. Surely Fierro can't stand up to much more of this?

10-9 Cruz, 20-18 Cruz

DOMINANT opener for Isaac Cruz.

Cruz and Fierro waste no time getting straight to business. Cruz is bullying Fierro around the ring, landing big power shots. It was an overhand right that began proceedings, but Cruz was landing everything on Fierro, including hooks with both hands and the straight right hand.

Fierro had a moment of success towards the end of the round when he let his hands go for a combination, but nothing overly significant. All-action between the Mexican warriors so far.

10-9 Cruz

Isaac Cruz (26-3-1, 18 KOs) looks to bounce back from his defeat to Jose Valenzuela in August against Angel Fierro (22-2-2, 17 KOs). Fierro is also coming off the back of a defeat, having been outboxed by Alfredo Santiago in his light welterweight debut in June.

With 45 seconds to go in round 8, the referee decides that there is no need for Jeison Rosario to take any more punishment and hands Jesus Ramos Jr. the TKO victory.

Rosario was on the wrong end of a beatdown from the opening bell, the bout was entirely non-competitive.

Jesus Ramos Jr. TKO-8

Ramos DROPS Rosario at the end of round 7 with a crushing 1-2 down the middle. Rosario is down for the 11th time in his career. There is no need to send Rosario out for round 8!

10-8 Ramos, 70-62 Ramos

1-2 from Ramos breaks the guard. Ramos lands a pair of POWERFUL uppercuts and Rosario is hurt along the ropes, he fires back a left hook and attempts to get out of harm's way.

Ramos connects with a hard left hand on Rosario's body followed by a combination upstairs. This fight is only going one way!

10-9 Ramos, 60-54 Ramos

Ramos hammering left hands on Rosario in round 4. For the first time in the fight, Ramos has started to hold his ground and really let power shots go consistently rather than hit and move.

Rosario isn't having any success at all. Unless he can turn something around, it wouldn't be surprising to see this fight being stopped in the next couple of rounds.

10-9 Ramos, 40-36 Ramos

Best round of the fight for Jesus Ramos Jr.

Ramos is starting to put his punches together now in 3-4 punch combinations. Rosario just cannot break the distance without getting caught on the way in. More brilliant body work from Ramos.

A 3-punch combination from Ramos breaks the guard. All one-way traffic up to now!

10-9 Ramos, 30-27 Ramos

Ramos is flicking out a nice southpaw jab early in round two, Rosario is attempting to pile on the pressure but it has been ineffective up to now.

A straight left-hand connects for Ramos. It was not a powerful shot, but it was eye-catching. Ramos continues to target Rosario's body with power hooks. A combo for Ramos connects.

10-9 Ramos, 20-18 Ramos

Rosario starts the contest attempting to walk Ramos Jr., who is moving laterally, down. Jabs are fired from both men during a cautious opening minute.

Ramos starting to let his southpaw straight left hand go in the second half of the opener to the head and to the body. Ramos starting to throw hooks to the body in the final stages of round 1; the body is clearly a focus area for him because of how frequently Rosario gets hurt downstairs.

10-9 Ramos

23-year-old middleweight prospect Jesus Ramos Jr. (21-1, 17 KOs) faces the former unified super welterweight champion Jeison Rosario (24-4-2, 18 KOs) over ten rounds to open the David Benavidez vs. David Morrell pay-per-view broadcast.

• Middleweight: Jesus Ramos Jr. vs. Jeison Rosario

• Super lightweight: Isaac "Pitbull" Cruz vs. Angel Fierro

• WBC featherweight title: Brandon Figueroa vs. Stephen Fulton 2

• Light heavyweight: David Benavidez vs. David Morrell

It was a come-from-behind win for Cuello, as he was down on all three scorecards (82-88, 83-87, 84-86) at the time of the stoppage, the Prime Video broadcast team has confirmed.

With just over a minute to go in the final round, Mirco Cuello drops Christian Olivo Barreda with a brilliantly placed left hook to the body. Olivo gets back up but succumbs to the same shot just seconds later, and this time the referee won't let it continue.

Mirco Cuello TKO-10

Mirco Cuello takes the 9th round with educated pressure throughout the 3-minute stanza and superior work rate. Olivo had his moments though, landing to the head and body and keeping Cuello honest with sharp counters.

10-9 Cuello, 85-85

A pair of right hands connect on Cuello just before the halfway point of round 8. Cuello responds with a combination, shifting levels from head to body. Right hand power shot from Cuello has an effect on Olivo's balance.

10-9 Cuello, 76-75 Olivo

Cuello cannot get out of the way of Olivo's straight right hand or right hand around the guard in round 7. Cuello eats a pair of right hands in the final minute, which is soon followed by a hard right hook. Left hook to the body from Olivo seems to have had an effect on Cuello as well.

10-9 Olivo, 67-65 Olivo

Mirco Cuello has put some nice combos together early in this contest, but his lack of a disciplined jab and defense is costing him, allowing Olivo to counter Cuello on the inside. Cuello needs to create some distance between himself and Olivo after he finishes punching and work behind a long, strong jab.

38-37 Olivo

Heavy underdog Christian Olivo Barreda DROPS Mirco Cuello in round two with a left hook-straight right-hand combination. The right hand was the damaging punch and forced Cuello to his knees. Big early breakthrough for the Mexican

Before the action began in Las Vegas, Adam Azim stopped the former IBF super lightweight champion Sergey Lipinets in the 9th round in the main event from Wembley, London, England.

Argentina's Mirco Cuello (14-0, 11 KOs) battles Mexico's Christian Olivo Barreda (22-1-1, 9 KOs) in a final eliminator for the WBA featherweight title.