Luka Doncic looked "fine" and was "smiling" but the Dallas Mavericks require more information on the ankle injury that saw him leave early in the 99-95 win over the Phoenix Suns.

Superstar Doncic lasted just three minutes of Thursday's road game due to a sprained left ankle, doing the damage when standing on a defender's foot and pivoting.

He immediately limped off with director of player health and performance Casey Smith, and later went for an X-ray that was negative.

Head coach Jason Kidd provided a brief update on Doncic after the game, though details of the severity of his injury remained light, saying they will know more ahead of Saturday's contest with the Utah Jazz.

"He was in good spirits. He looked good. He looked fine," Kidd said in quotes reported by the Dallas Morning News.

"But we'll see as we go forward here. We'll have probably more information once we get to Utah.

"He was smiling and he was happy for his team-mates, saying DP [Dwight Powell] made some big free throws but then to come up with that missed free throw rebound. 

"Just his grit tonight for DP was at a high level. The character of that team played hard and found a way to win.

"It was the whole group defensively. To hold a team like Phoenix under 100 points is a big deal. The guys in that locker room should be proud."

Without Doncic, Spencer Dinwiddie contributed a season-high 36 points, while Dorian Finney-Smith had 18 to go with 12 rebounds.

"It's just an all-around great team effort. Once we found out [Luka] was out, we just stepped up," Finney-Smith said.

The Mavericks (26-24) had lost six straight regular-season games to the Suns prior to the win, though they did topple them in last year's Conference semifinals.