World Peace is day-to-day and will be re-evaluated in Minnesota on Tuesday. The Lakers face the Timberwolves on the road on Wednesday.
"He said that the back of his knee was bothering him and I told him, 'Well, if it's bothering you, you just can't go out,'" Lakers coach Mike D'Antoni said. "He's just really hurting, so that's why we held him (out), but I don't know what that means."
World Peace could not remember the specific play that caused the aggravation but said it occurred late in the second quarter.
D'Antoni said that World Peace told him he felt fluid in the back of his knee and it is an issue he has played with before.
World Peace would not confirm any fluid buildup in his knee to reporters after the game before limping out of the locker room with his left leg straightened as he walked.
"He's a tough guy, so don't count him out," D'Antoni said.
World Peace had 7 points, 2 steals and 1 assist in 19 minutes before exiting the game.
The 14-year veteran was unsure whether he would be able to play against the Wolves, but added, "I'm not in pain."
"He got away with a shot," said Howard, who was called for a technical foul -- his ninth of the season -- for arguing after the hit occurred. "I'll remember this game; I'll remember that shot."
Howard said Lee told him the play was unintentional, but the Lakers center did not buy his explanation.
"You can look at the play and see for yourself," Howard said.
Howard said he did not say anything back to Lee, adding, "I'll take care of it later."