Bantamweight Luis Nery is transitioning into a full-fledged contender.

That was evident on Saturday night, when he forced David Sanchez to remain on his stool, at the end of Round 4, before a crowd of about 4,000 at the Municipal Auditorium in Tijuana, Mexico.

With the win, Nery improves to 20-0 (14 knockouts) and Sanchez falls to 29-4-2 (22 KOs).

Sanchez had his moments in the opening session, scoring with lead right crosses to the head, but everything changed in Round 2.

Nery was able to close the distance and connect repeatedly. His high punch-output troubled Sanchez, particularly in the third when a left cross to the head sent his opponent reeling into the ropes.

The accumulation of punches took a toll on Sanchez near the end of the fourth, when he went down on one knee courtesy of a Nery left to the mid-section. Sanchez made it out of the round, but he’d had enough.

“I’m very happy with the win,” said Nery, who is promoted by Zanfer. “We would like to challenge for a world title.”

Nery, who resides in Tijuana, is ranked No. 8 by the WBA and No. 10 by the WBO.

In the opening bout of the beIN Sports en Espanol broadcast, welterweight Jaime Munguia stopped Oscar Mora at 0:55 of Round 2.

Early in the second, Munguia (16-0, 13 KOs) hurt Mora with a right cross to the head. He followed up with a barrage of punches, eventually dropping Mora (5-2, 5 KOs) with a left hook to the body, which prompted the referee to halt the action.

Munguia has won his last seven bouts by knockout.

Flyweight Sulem Urbina was victorious in her pro debut, winning a four-round split decision over Eloisa Martinez (1-4-1).

Francisco A. Salazar has written for RingTV since October of 2013 and has covered boxing in Southern California and abroad since 2000. Francisco also covers boxing for the Ventura County (CA) Star newspaper, Boxingscene.com, and Knockout Nation. He can be reached by email at [email protected] or on Twitter @FSalazarBoxing