Chris Paul hobbled off with an apparent groin problem in the Phoenix Suns' loss to the Denver Nuggets.
The Suns lost 97-87 on Monday, with the Nuggets moving into a 2-0 lead in the series.
There was further concern as Paul left the game in the third quarter, and the Suns can now only hope for the best in regard to his status.
"All we can do is hope he has a speedy recovery," said Devin Booker, who scored 35 points.
"We're going to be behind him. We're going to hold it down while he is out, or if he's out, and just take it from there."
Monty Williams added: "He just came up where he couldn't push off of it or anything.
"We're not quite sure what it is right now, but it seems to be something in the groin area. We'll find out more [on Tuesday].
Should Paul fail to recover, Booker said he is ready to shoulder extra responsibility.
"I mean, the playoffs is a lot, a lot comes with this, so you just have to embrace it," he said.
"Embrace the challenge, embrace the opportunity that we have right now, even down 0-2.
"Get back home, protect our home court and go from there. But a lot is on all of our plates, and that's everybody throughout the playoffs right now."
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