Williams said after Saturday's Game 4 that he didn't play in the fourth quarter in part because he was dealing with back soreness, Mike Mazzeo of ESPN reports. Williams still logged 26 minutes of action Saturday but his inability to play in the fourth quarter is certainly concerning. Coach Lionel Hollins didn't necessarily qualify Williams' back soreness as the reason why he wasn't sent onto the court in the fourth quarter, so there may also be an internal disagreement between the two of them. Either way, Williams is a risky option moving forward with a sore back or with an unfavorable coaching situation.