Duran , fighting in his home city of Madrid , was knocked down in the third round by a left hand to the jaw .
Duran lost his title in his first defence , against the Argentine challenger Miguel Angel Castellini on October 8 , 1976 .
Duran , fighting in Duran 's home city of Madrid , was knocked down in the third round by a left hand to the jaw .
Duran lost his title in his first defence , against the Argentine challenger Miguel Angel Castellini on October 8 , 1976 .