Andre Iguodala's injury is more serious than initially believed.

The Warriors guard is listed as doubtful for Game 4 of the Western Conference finals against the Rockets on Tuesday with knee soreness, The Athletic reported Monday.

Iguodala appeared to injure his knee during Game 3 on Sunday and was forced to leave the game midway through the fourth quarter, though Warriors coach Steve Kerr was optimistic that the severity of the injury wasn't a concern.

“I think he’s OK there,” Kerr said after the game, via SF Gate. “He got banged on the knee. I think it was like a knee-on-knee type of thing. He said he would be all right.”

Iguodala finished with 10 points on 4-for-6 shooting to go with three assists and three rebounds as the Warriors took a 2-1 series lead with a 126-85 rout of the Rockets.

“When we’re playing how we are supposed to play, Andre’s right in the middle of it,” Kerr said of Iguodala. “His defense and being smart, making good decisions. Andre is one of the guys who seems to set the tone for us, and I thought he did a great job of that tonight.”

Golden State will look to extend its series lead when it hosts Houston in Game 4 at 9 p.m. ET Tuesday.