Porzingis, who was 4 of 13 from the field, including 1 of his first 5 — all 3-point attempts — played 23 minutes and finished with 11 points, five rebounds and three assists.
He’s still working out the kinks from missing the past 18 months while recovering from a knee injury.
“I just missed open shots,” Porzingis said. “It would have looked way different if I had hit a few more shots early and got into a better rhythm. Slowly, we’ll figure it out and we’ll put this thing together.”
But other Mavericks made some noise in the home preseason opener, a 118-111 loss to the Milwaukee Bucks.
J.J. Barea played his first game since a torn right Achilles tendon sidelined him in January. He had three points in 12 minutes.
Justin Jackson came off the bench to score 13 points on 5 of 9 shooting, including 3 of 6 from the arc.
“I wanted to give [Barea] a long run tonight,” Mavs’ coach Rick Carlisle said. “This is the beginning in terms of real NBA action. We have two more [preseason] games, which are all important. We want to get everybody ready. We are going to need everybody.”
Center Boban Marjanovic, 31, made 6 of 9 shots and finished with 16 points and eight rebounds in 15 minutes.
Luka Doncic, who led Dallas with 21 points Wednesday in Detroit, finished with a team-high 27 in 23 minutes. He had 20 at the half and finished 5 of 8 from the arc. He made 10 of 11 free throws after going 5 of 10 against the Pistons.
Porzingis joked that he was almost “too open” on some of his early 3-point attempts.
“Wide-open looks, too. I almost want to work more for the shot. I’m used to kind of banging around a little more,” he said. “But if I’m open I’m going to take those shots and I’ve got to knock them.”
“It was awesome. For a preseason game I think it was great,” Porzingis said of the fan reception for his first game in Dallas.