Interim WBA light welterweight champion Marcos Maidana, (31-2, 28 KOs), scored a fourth round knockout win over #14 rated Petr Petrov, (29-3-2, 13 KOs), at the Sociedad Alemana de Villa Ballester in Buenos Aires, Argentina on Firday night.
Petrov touched in the opening and was given a count. He was floored again at the beginning of the fourth round and again later in the round for the full count.
Petrov was a late replacemnt after his title defense against Robert Guerrero fell through after Guerrero was injured in training.
light welterweight Angel Amado Aguirre w ko 5 Oscar Jesus Pereyra
light middleweight Guido Nicolas Pitto w pts 6 Roberto Dionicio Moreno
light welterweight Gonzalo Gabriel Ovando 9w tko 4 Diego Humberto Mora
featherweight Julian Evaristo Aristule w pts 4 Maximiliano Ezequiel Mendez
September 23, 20011