Nowitzki scored 30 points and Nash added 21 and 13 assists as Dallas posted a 107-94 victory at Philadelphia on Thursday. Michael Finley scored 19 points and Nick Van Exel added 16 for the Mavericks, who have won two straight road games after a three-game skid on the road.
Dallas is 17-2 against Eastern Conference foes this season, losing only to Indiana and Milwaukee. The Mavs are 7-0 against Atlantic Division opponents.
The Mavs used an 11-2 run to build a 61-49 advantage in the third quarter. Nowitzki highlighted the spurt with seven straight points with a 3-pointer, an 18-foot jumper and an athletic layup.
Dallas continues to own the best record in the NBA at 33-8, and the best road mark as well, 14-6.
The Mavs are seeking to end a 10-game losing streak at Madison Square Garden since a 96-91 victory on November 6, 1990. That season, Mavs coach Don Nelson was coaching the Golden State Warriors. He coached the Knicks in the 1995-96 season.
Nash and Nowitzki each scored 19 points as Dallas posted a 107-82 rout of New York on December 28. The Mavs finished with 31 assists on 45 baskets.
New York is over .500 at home for the first time under coach Don Chaney this season after an easy 97-88 victory over Denver on Wednesday. The Knicks are trying for a season-high fourth straight victory.
The Knicks own a surprising 5-4 record against the West.