Kyrie Irving and LeBron James combined for 76 points as the Cleveland Cavaliers battled to a 112-99 victory over the Boston Celtics on Tuesday to move within one game of a place in the NBA Finals. The win gives Cleveland a 3-1 lead in the best-of-seven series and leaves them firmly on track for a third consecutive NBA Finals showdown against the Golden State Warriors. Cleveland, stunned by Boston in Game 3 after romping two blowout wins in the opening two games of the Eastern Conference series, looked to be heading for another shock as the Celtics dominated the first half.