Dominican fighter Argenis Mendez captured the International Boxing Federation junior lightweight title on Saturday by knocking out Mexico's Juan Carlos Salgado in the fourth round.
Mendez avenged a 2011 loss to Salgado in his only prior world title bout by landing a hard left to the head and sending the champion to the canvas, where he was called out 45 seconds into the fourth round.
Mendez, who also sent Salgado to the canvas in the opening round with a hard right to the jaw, improved to 21-2 with his 11th career stoppage inside the distance while Salgado fell to 26-2 with one drawn.
Salgado defeated Mendez by unanimous decision in 2011 to claim the vacant title and he had defended the crown twice last year, both by unanimous decisions, most recently over Argentina's Jonathan Victor Bargos last August.
Mendez won for the third time since losing to Salgado, having taken a unanimous decision over Mexico's Matin Honorio last July to book himself another chance at the throne.