Brandon Bass, Avery Bradley

Boston Celtics' Brandon Bass, left, knocks the ball away from teammate Avery Bradley during the second half of the Miami Heat's 83-75 win over the Boston Celtics an NBA basketball game in Boston, Sunday, Feb. 1, 2015.

(AP Photo/Winslow Townson)

BOSTON - The Boston Celtics have informed rookie guard Andre Dawkins they intend to extend him another 10-day contract, he told MassLive.com Sunday afternoon.

Dawkins' initial 10-day pact expires at the end of Sunday. He has spent most of the past two weeks with Boston's D-League affiliate, the Maine Red Claws, but said he will travel to New York with the Celtics on Sunday night.

"It's good," he said after receiving a DNP-CD in Sunday's 83-75 loss to Miami. "I get another 10 days with the team and obviously keep learning, try to get a little bit better every day."

Dawkins has averaged 20.0 points over four games with the Red Claws. Through 15 total D-League games this season, he is scoring 22.1 points per game on 45.8 percent shooting, including 46.2 percent from behind the arc.

"They're not really worried about me shooting the ball," he said. "They know I'm going to be able to do that. It's more so what I can get better at, and a lot of that's at the defensive end. The team defensive concepts are a little different than what we did in Miami, so it's been an adjustment trying to learn how they want to play certain things, certain pick-and-rolls here and there. It's been good to be (in Maine) to get a lot of reps at it and try to get better at it."

Prince sits with hip flexor injury

Tayshaun Prince missed the game due to a hip flexor injury, which he said started over the Western Conference road trip. The veteran warmed up with intentions of playing through the pain but could not get loose enough to go.

If tip-off had been later than 1 p.m., he thought he might have had enough time to alleviate the stiffness.

"I felt it in the Houston game too. The Houston game it just wasn't as bad. But it got worse today so I just had to let them know before the game. I tried to do everything I possibly could before the game but just couldn't do it," he said. "It just kind of locked up on me a bit but I'll be alright. Usually over my career I've played through a lot, but nowadays if you play through it you can kind of make it worse, especially with the miles and stuff that I've logged."

Prince believes he should return Tuesday against the New York Knicks, but cautioned that it's "not 100 percent" certain.

"We missed him," head coach Brad Stevens said. "A lot."

Bradley aggravates thumb

Avery Bradley said he suffered "a little fracture" in his left thumb during the third quarter, terming it "basically like a sprain/fracture thing."

The same thumb had actually been bothering him for a while.

"I just jammed it (before)," he said. "Got an X-ray today."

It seemed unfortunate that he got hurt during the third quarter, when he got hot to score 10 of his 17 points.

"No, I didn't come out because of this," he said. "I kept playing on it. It was time for me to come out. He was putting someone else in to bring a spark off the bench, so it was just perfect timing for me to come out and get an X-ray."