sentences:  In a close fight, Chagaev prevailed, taking a split decision with scores of 117–111 and 116–112 for Chagaev, and 115–114 for Ruiz.Chagaev became the mandatory challenger for a shot at Valuev, whom he defeated on April 14, 2007, to claim the WBA heavyweight championship.Ruiz faced Otis Tisdale on October 13, 2007, and ended the fight with a TKO victory in the second round as referee Pete Podgorski called a halt to the bout as Tisdale went down for the third time.