Paul limped off the court with a strained hamstring in the third quarter of the 93-80 win over the New York Knicks on Wednesday but he was seen on an exercise bike later in the evening.
"I think he's doing good," Rivers told reporters. "[Clippers trainer Jasen Powell] said he could have come back in but there was no chance he was coming back in. Chris has told me already twice that he'll be ready for Friday but that doesn't mean that that's true. That's just what he said."
The point guard was also quick to insist that he could have returned to the court on Wednesday if his presence was needed.
"I went to the back and I was on the bike watching the game. I came back and I told Doc if you need me I can go. It's a little tight but I'll be ready Friday," Paul revealed.
Paul is averaging 19 points per game this season.