LAS VEGAS – Guido Schramm took up boxing because he was inspired by countryman Sergio Martinez’s performance against Julio Cesar Chavez Jr. in their middleweight title fight in September 2012.

The courageous Argentinean found himself on the wrong end of a brutal beating by another southpaw Saturday night, just down the road from where Martinez beat Chavez at UNLV’s Thomas & Mack Center. Junior middleweight contender Jesus Ramos ravaged Schramm to this head and body for six-plus rounds, until referee Mark Nelson mercifully stopped their one-sided fight on the Sebastian Fundora-Chordale Booker undercard at Mandalay Bay Resort and Casino’s Michelob ULTRA Arena.

Nelson stepped between them at 1:38 of the seventh round. Schramm remained on his feet when their scheduled 10-round middleweight fight ended, but he had taken a lot of punishment.

Ramos (23-1, 19 KOs) recorded his second knockout in only seven weeks. The Casa Grande, Arizona native previously stopped former unified 154-pound champion Jeison Rosario in the ninth round of their fight February 1 on the David Benavidez-David Morrell Jr. undercard at nearby T-Mobile Arena.

“I had some obstacles,” Ramos told Prime Video’s Brian Campbell in the ring. “I hurt my hand in the third round, but I battled through it. I made a promise, so I had to get him out of there.”

Buenos Aires’ Schramm took this difficult fight on a little less than three weeks’ notice once Ramos’ original opponent, Mexico’s Kevin Salgado, withdrew from their fight for undisclosed reasons. Schramm (16-4-2, 9 KOs) suffered his second straight knockout defeat and his third overall loss in a row.

“Overall, I felt good,” Ramos said. “I did what I wanted. I wanted to get him out of there a little earlier, but he’s a warrior. Everything was working, almost too good. That’s where I hurt my hand and I backed off a bit. It was hurting a lot so I kind of boxed a little bit.”

After assaulting Schramm again during the sixth round, Ramos finally finished him off in the seventh round. His left hand violently snapped back Schramm’s head just after the midway mark of the seventh round.

Several subsequent power shots then encouraged Nelson to save Schramm from himself.

An aggressive Ramos took target practice on the resilient Schramm throughout the fifth round. Nelson kept a close eye on Schramm, but he hadn’t seen enough reason to stop the bout by that point.

Ramos blasted Schramm with a right hook and then a straight left in the final 20 seconds of the fourth round. Schramm mostly absorbed a lot of punishment in that round.

Another thudding left hand by Ramos backed up Schramm with just over 40 seconds on the clock in the third round. Ramos mostly had his way with the game but overmatched for most of the third round.

Ramos landed a left that knocked Schramm backward exactly halfway through the second round. The strong southpaw was more effective during those second three minutes than he was in the opening round.

Schramm was aggressive during the first round because he felt like he couldn’t allow Ramos to get into a rhythm as soon as their bout began.