From Dana Gauruder's blog for the Oakland Press:
The last thing the Pistons need after losing Game 1 is an injury to one of their regulars. That's why it was alarming to see Chauncey Billups walking slowly and flexing his right knee after practice. According to Billups and Flip Saunders, it was just some minor soreness. Billups attributed it to a tough practice while walking to his car after leaving the practice facility, though he was held out of a practice last week because of soreness. "I'm all right," he said several times. Saunders didn't act concerned, either. "Chauncey's always in a situation where he gets hit a little bit but he's OK," he said.
It's probably nothing, but every Detroit paper mentioned it.