SAN ANTONIO — French prodigy Victor Wembanyama scored 15 points for the San Antonio Spurs in his much-anticipated National Basketball Association debut but Luka Doncic's triple-double spoiled his start as Dallas beat the Spurs, 126-119.

This year's top NBA Draft pick, in foul trouble throughout the second half, made 6-of-9 shots from the floor, 3-of-5 from three-point range, with five rebounds, two assists, two steals and a blocked shot over 23 minutes in his first NBA contest.

"It was a lot of emotion. It would have been perfect to win," Wembanyama said.

"Tonight really marks the beginning. It's still a dream, I hope to keep that dream feeling."

Doncic had 33 points, 14 rebounds and 10 assists for the Mavericks, who scored the last eight points for the victory.

"It all starts with our defense," Doncic said.

"We played good defense for three quarters but especially at the end we locked in."

Wembanyama, the 19-year-old phenomenon considered the top NBA prospect since LeBron James, used his 7-foot-4 frame, surprising quickness and outside shooting touch to display his arsenal of skills in the first game of his rookie campaign.

"I was happy. It's representative," Wembanyama said of his performance.

"This in itself is not exceptional. But I hope what I do next will make it special."

Wembanyama had two fouls in the first quarter, two more early in the third quarter and his fifth only 26 seconds into the fourth quarter.

"Maybe I wanted to do too well, not to put my energy into the right things," he said.

"I don't need to put that much energy into defense. I'm learning for the first game. These are simple things."

He returned with 7:12 to play and sparkled late. Wembanyama made an alley-oop dunk off a pass from Devin Vassell, added a three-pointer, and his dunk with 4:56 to play gave the Spurs a 113-112 lead.