In their sixth game, Dirk Nowitzki and the Dallas Mavericks finally looked like the reigning NBA champions. They loaded up on easy baskets. They forced the league's last unbeaten team to miss way more shots than usual. And the best highlights came from their superstar, as Nowitzki scored 10 of his 26 points during a third-quarter spurt that sent the Mavs to a 100-87 victory over the Oklahoma City Thunder on Monday night.