Photos: Canelo Beats Down Chavez Jr. - MONSTER Gallery

LOS ANGELES - No sooner did boxing's biggest star Canelo Alvarez (49-1-1, 34 KOs) dispatch Julio Cesar Chavez, Jr. (50-3-1, 32 KOs) in a dominant shutout victory over 12 rounds at the sold-out T-Mobile Arena on presented live on HBO Pay-Per-View, than the middleweight superstar announced that boxing's biggest fight - a showdown with Gennady "GGG" Golovkin (37-0, 33 KOs) - would take place on Mexican Independence Day weekend on September 16. Canelo beat Chavez, Jr. from pillar to post, earning a unanimous decision with all three judges scoring the fight 120-108. Photos Ed Mulholland/HBO, Tom Hogan/Hoganphotos

In the co-main event, Montreal-based slugger David Lemieux (38-3, 33 KOs) won a hard-fought unanimous 10-round decision over an extremely game Marco "Dorado" Reyes (35-4, 26 KOs).The three judges all saw the super middleweight tilt for Lemieux by the scores of 98-91 and 99-90 twice. Lemieux beat and bloodied Reyes from the first round on, but Reyes never went down.

"He is a solid fighter," Lemieux said. "I give him the respect, he went the full 10 rounds. I could have done better but I hurt my hand after round two."

"We obviously came with the best we had," Reyes said. "In the last rounds, my objective was to throw as many shots as I could because I knew when I lost that point I was going to have to knock him out to win. He's a great fighter and there's a reason why he's the third ranked in the world. We're satisfied with the fight and the performance, and we did our best."

Returning from a year-and-a-half layoff and making his debut at welterweight, Lucas "La Maquina" Matthysse (38-4, 35 KOs) of Chubut, Argentina roared back from his time off with a thunderous fifth-round knockout of Cleverly, Maryland's Emanuel "Tranzformer" Taylor (20-5, 14 KOs).

"This victory motivates me, this is exactly what I needed to come back where I left off," Matthysse said. "I felt great inside the ring and I felt like I dominated the fight at the pace I wanted. I feel great and I'm ready for what's next."

"My plan going in was to win," Taylor said. "My opponent was a tough guy, but I don't know why the ref stopped the fight. I could've kept going more rounds. After this, it's back to training hard with my team."

Opening up the pay-per-view, 2012 Olympian Joseph "JoJo" Diaz, Jr. (24-0, 13 KOs) emerged victorious over Manuel "Tino" Avila (22-1, 8 KOs) in a 10-round battle for the NABF and NABO featherweight titles. Diaz of South El Monte, California, won a unanimous decision by the scores of 100-90 and 99-91 twice.

"My plan going in was to feel him out and be smart," Diaz, Jr. said "Once I had him figured him out, I knew I could keep digging at him with my jab and do work. In the last few rounds, I kept throwing body shots to hurt him, which worked. Next up, I'm looking for a world title shot."

 "My timing wasn't there -- I felt like this was a learning experience," Avila said. "I need to learn how to pick up the pace in between rounds. Our styles were off and I felt like it could have been a better fight."

Closing the free-view, 15-time national amateur champion Ryan "Kingry" Garcia (9-0, 8 KOs) extended his knockout streak to five, knocking down Tyrone "Hands of Stone" Luckey (8-7-3, 6 KOs) mere seconds into the first round and unloading in the second until the referee waived off the fight.

"The better the competition, the better the fight for me," Garcia, fighting in the lightweight division, said. "I felt this was a really great chance for me to show off my skills because I usually get the knockout early. This fight was different because I was able to show how quick I can pop my opponent with a hook. People think because I'm small, I don't have power-but I have explosive power and speed. I'm ready to go make history from here."

In a quick turnaround from her March debut, 2012 Bronze Medalist Marlen Esparza (2-0) of Houston, Texas shut out Samantha Salazar (2-4-1) of Dallas, Texas over four rounds, earning the 40-36 unanimous victory on all three scorecards. The flyweight battle featured the debut of three-minute rounds in women's boxing in the state of Nevada.

"It's great to make history being the first woman in Nevada to do three-minute rounds," Esparza said. "I know it's been done elsewhere-but tonight it feels really special doing it in this fight. I plan on staying at three minutes and not going back to two minutes, so I know we will need to be strategic about how I train and fight."

Opening up the free view, 2016 Mexican Olympian Raul Curiel (1-0) of Tamaulipas made his professional debut a successful one, earning a unanimous victory decision over Michoacan, Mexico's Jesus Sanchez (1-2-2) in a four-round super welterweight affair.

"I thought I won all four rounds, but I got the win that I needed," Curiel said. "I thank God for me and my opponent being able to get out of the ring healthy and safe - he was a strong fighter. I'm going to go back to Mexico for vacation, and jump back into the ring to get ready for my next fight."

Continuing to build towards a world championship title shot, the slick Santa Ana California-based Ronny Rios (28-1, 13 KOs) unloaded power shots on Daniel "El Chato" Noriega (28-11-1, 15 KOs) until the referee waived off the fight in the fourth round of a scheduled 10-round super bantamweight fight.

"I'm obviously proud of the knock out win but I think as a fighter we are always critical of our performances," Rios said. "I need to clean up a lot of my mistakes including leaning forward too much and loading up my punches; however, I'm ready for a title shot and some Micheladas for the Cinco de Mayo weekend."

Opening up the action in the first fight of the evening, lightweight Joseph "Diamante" Aguirre (17-0, 9 KOs) from Cancun kept his undefeated record intact with a shutout unanimous, six-round decision over fellow Mexican countryman Angel "Sinaloa" Aispuro (8-5-2, 5 KOs).

"I hurt my hand in the third round, but I fought like I usually do so no one would notice, " said Joseph Aguirre. "I was and still am nervous, but at least I can say that I fought on such a big card. I feel like I had a good performance. My opponent was strong and came forward, and could take a punch."