Shawn Marion and Elton Brand scored 17 apiece, Vince Carter again provided a spark off the bench and Dallas beat Orlando.
The victory snapped a nine-game winning streak for the road team in the series, and the Magic lost for the 26th time in 29 games despite a third-quarter surge that put them in front.
The Mavericks put away an Orlando team playing on the second night of a back-to-back with a 17-0 fourth-quarter run that restored the double-digit lead they had in the second quarter.
Carter finished with 14 points and had another burst of key 3-pointers to help Dallas retake the lead. Dirk Nowitzki had 12 points and a team-high nine rebounds.
Jameer Nelson felt his left knee give out with 4:49 to go, he said: 'I think it should be OK just by the way it’s feeling,' 'I don’t want to make an assessment on it right now without getting fully evaluated by the doctors and getting all the MRIs and all that stuff I have to get probably. Hopefully, it’s not too serious and I can move forward.'
Arron Afflalo led Orlando with 21 points.