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Cotto faced WBC and The Ring Middleweight champion Sergio Martinez for the titles on June 7, 2014 in his first fight in the middleweight division at Madison Square Garden. Cotto knocked Martinez down 3 times in the first round and once in the ninth round before Martinez retired on his stool before the tenth round, giving Cotto the win by ninth-round corner retirement. With the win, Cotto became the first Puerto Rican boxer to win world titles in four different weight classes.