Brooklyn Nets star James Harden is questionable to face the Portland Trail Blazers due to neck soreness.

Harden appeared to hurt his neck during a collision with Garrison Mathews in Sunday's 113-106 NBA win over the Washington Wizards.

Now, Harden is in doubt for Tuesday's clash with the Trail Blazers in Portland, where the star-studded Nets will be without Kyrie Irving (personal matter) and Kevin Durant (hamstring).

After posting 26 points, eight assists and five rebounds, Harden told reporters: "I got hit in the jaw. My neck kind of twitched. I'll be all right.

"It's nothing. Get some treatment on it, get some rest and be ready to go the next game."

Harden was on the court for 39 minutes, the most for any Nets player. Prior to Sunday's win, the former Houston Rockets star had featured for 40-plus minutes in four of the franchise's previous eights outings either side of the All-Star break. 

This season, Harden is averaging the most minutes in the NBA with 37.9, with Julius Randle of the New York Knicks next on 37.

"I'm concerned about the minutes," Nets head coach Steve Nash said after beating the Wizards.

"I'm not sure what the answer is, though. He controls the game. He hasn't shot the ball well since the [All-Star] break, but he made three threes tonight.  

"He gets to the line. He makes assists, rebounds, steals. He's great around the basket. He had another great performance even if it wasn't necessarily a typical Harden game.  

"So it's hard to take him off the floor because he makes his team-mates better."

Harden is averaging 25.3 points, a league-best 11.1 assists and 8.0 rebounds per game for the Nets this season.

The former MVP tops the list for most assists in the league this season (410), while he ranks fifth for points/assists/rebounds averaged per game (44.4).