It's gonna be an explosive fight. I read in some forums that Golovkin did well againts Canelo in their sparring sessions.
Alvarez began the session sticking and moving effectively. The young redhead was on his toes when he maneuvered around the casually advancing Golovkin, but he planted his feet every time he let his hands go, including his stiff jab. However, Golovkin picked off most of Alvarez’s shots with his gloves as he quickly cut the ring off, occasionally switching stances as he stepped forward. The 2004 Olympian slipped a beautiful left uppercut through Alvarez’s guard to score the first significant punch midway through the round. Alvarez loaded up with a retaliatory hook that missed and spun him halfway around. Golovkin didn’t jab much, but he landed it whenever he let it go. Alvarez began to look for ways to counter his antagonist in the final minute and scored with a sweet right cross followed by a hook that shook Golovkin down to his shoes. The Kazakh just smiled at him, though. Unfazed, Alvarez stood his ground in the final 30 seconds and took a few hard body shots.
Golovkin stalked a little faster while displaying decent head movement and a nice straight, crisp jab. Alvarez definitely felt the pressure as he gave ground without allowing his back to touch the ropes. He used fluid upper-body movement to evade Golovkin’s short power shots, which prompted co-trainer Jose Reynoso to yell “Bien, bien, muy bien!” from the corner. Alvarez landed a picture-perfect head-to-body hook combination mid-round. Golovkin fired back but the kid leaned away from the punches. Alvarez tried to counter Golovkin but couldn’t get through the older fighter’s guard. Still, the young man’s accuracy backed Golovkin off for the first time during the session. Alvarez followed Golovkin during the final minute but walked into a hard left hook that appeared to rock him with 10 seconds remaining. Alvarez didn’t return to his corner after the bell but instead tried to shake out his right leg, which immediately stiffened on impact of Golovkin‘s hook.
Rounds three and four:
Alvarez abandoned his jab and his upper-body movement and took the fight to Golovkin with both hands. Golovkin welcomed the aggression, easily blocking Alvarez’s punches while landing most of his. Alvarez sucked it up and even walked forward while attempting to block as much heat as he could, but it was clear that he could not match Golovkin’s strength or power. Still, the budding young star got in an occasional power punch whenever he let his hands go in bunches. His hook-right combination found the mark but his technique was not as tight as it was at the start of the session and his face was turning beet red from Golovkin‘s punches. The kid showed guts but he didn’t merit a single “bien” from Reynoso in the third round. He didn’t hear it until two and half minutes into the fourth round, when he let loose with a blazing five-punch combination. Golovkin dodged or parried most of the shots but Alvarez earned his respect for the round.
A tired-looking Alvarez resumed his jab and lateral movement to buy himself a breather. His jab was especially effective when he shot-gunned it. Golovkin neglected his jab and looked to counter Alvarez’s left stick with single power punches (the hook in particular). Alvarez did more moving along the ring perimeter (his back now grazing the ropes) than punching, but he got off hard shots when he did let his hands go.
Alvarez caught his second wind in the final round, bouncing on his toes with quick one-two combinations. “Muy bien!” Reynoso yelled after Alvarez landed a right uppercut-right cross combination off the ropes. Golovkin grinned again and attacked Alvarez’s body as the kid tried to spin away. They both loaded up with single power punches during the final minute of the round.
Obviously he had great power, but he seemed one dimensional, I don't remember him beating anyone with a notable name.
He went into Vicente Mosquera's hometown and knocked him out when Mosquera was ranked the #3 best junior lightweight in the world behind Pacquiao and Barrera by Ring Magazine.
He went into Antonio DeMarco's hometown and stopped him despite suffering a brutal cut in the 2nd round. He won practically every round and outboxed the Mexican.
Valero blitzed Antonio Pitalua in two rounds when Pitalua was a top 5 ranked lightweight at the time by Ring Magazine. Pitalua had recently knocked out Santa Cruz after Santa Cruz was robbed against the lineal lightweight champ of the world.
Bottom line is that Valero was the real deal. He faced some solid competition and rarely lost a round. He would've been a star if he hadn't been badshit insane. And I do believe that he would've eventually defeated Pacquiao had his career continued.