Rodel Mayol throws a punch at WBO junior flyweight champion Ivan Calderon of Puerto Rico during their bout in San Juan, Puerto Rico. Calderon won by split decision after the fight was stopped due to an accidental head-butt in the seventh round. (AP)

Rodel Mayol lost in his fourth attempt at the world title Saturday, bowing to Puerto Rican Ivan Calderon via slit decision at Coliseo Jose Miguel Agrelot, Hato Rey, Puerto Rico.

The bout was stopped in the seventh round following another head clash. Their first match resulted in a controversial split draw at the Madison Square Garden when the match was stopped in the sixth round due to an accidental headbutt.

Two judges had it 68-65 for Calderon while the other saw it 68-65 for Mayol.

Meanwhile, Donnie Nietes and Z Gorres came out on top of their separate bouts against Mexican opponents in El Pelenque de la Feria in Tepic, Nayarit, Mexico.

Nietes (25-1-13) kept his WBO minimumweight title against Manuel Vargas via 12-rounds split decision.

The score cards were 116-110 and 118-110 for the Filipino while another judge gave Vargas 116-112.

This is the third title defense of Nietes, his second win in Mexico and his 12th straight win.

On the undercard, Gorres retired former bantamweight champion Cruz Carbajal in the fifth round of the match due to an injury.

With the victory, Gorres is being eyed for a title before the end of the year.