Lakers forward Pau Gasol left the team's 131-96 win over the Mavericks on Sunday night with a left hamstring strain.

He missed the first 11 games of the season with a right hamstring strain.

"Anytime Pau has an injury, we're very concerned," Lakers coach Phil Jackson said. "He complained before the game started he was feeling some tightness."

A team spokesman said Sunday night that Gasol would undergo an ultrasound test on Monday.