WASHINGTON, April 4 (UPI) -- Washington Wizards guard Gilbert Arenas sprained his left knee in the team's 108-100 loss to the Charlotte Bobcats Wednesday night.
The all-star, who left the contest late in the first quarter, is slated for an MRI Thursday morning to determine the extent of the injury.
The Washington Post reported that he did not start for the first time this season Wednesday night after being late to the team's pre-game shoot-around.
Arenas entered the contest late in the opening stanza, and in less than two minutes, he collided with Charlotte swingman Gerald Wallace and fell to the floor.
He was helped to his feet and immediately went to Washington's locker room.
He did not return.
Arenas is the second starter to suffer a major injury this week.
The team lost fellow all-star Caron Butler for at least six weeks to a fractured right hand in Sunday's 121-107 victory at Milwaukee.