"It's only a bump," D'Antoni told reporters. "It's not a tear or something like that. It's a bruise. We just have to make sure he's 100 percent the next time he plays.
"I don't think there's (concern). All indications are he should be OK."
Paul originally suffered the injury in a preseason game against Memphis on Oct. 11, when he bumped knees with Grizzlies guard Mario Chalmers.
He played 33 minutes in the season-opening win over the Warriors but had just four points on 2-of-9 shooting, though he did contribute 11 assists.
The Rockets acquired the 32-year-old Paul from the Los Angeles Clippers in an offseason trade.