Monta Ellis scored 21 points and the Dallas Mavericks rolled to a 113-92 victory over San Antonio on Wednesday night, snapping a 10-game skid against the Spurs and evening their first-round series at a game apiece.Shawn Marion scored 20 points, Dirk Nowitzki added 16, Devin Harris had 18 and Jose Calderon 12 for Dallas, which never trailed after the opening minutes of the second quarter at San Antonio.