The AP reports: Chauncey Billups made big shots and the Denver Nuggets got plenty of key stops. Billups scored 22 points, Carmelo Anthony added 21 and the surging Nuggets cruised to a 91-81 victory Wednesday night over the injury-riddled San Antonio Spurs. Kenyon Martin added 18 points and Nene had 16 to round out a balanced attack by the Nuggets (8-4), who have won four straight and seven of eight overall since Billups joined the lineup following a blockbuster trade that sent Allen Iverson to Detroit… Still playing without All-Star guards Tony Parker and Manu Ginobili, the Spurs (5-6) failed to move above .500 for the first time this season. They shot 39 percent from the floor and were led by rookie George Hill’s 20 points. Michael Finley had 13.