Lakers coach Phil Jackson said Sasha Vujacic might miss the first round of the playoffs after suffering a sprained left ankle. X-rays were negative and an MRI exam was scheduled for Thursday. Ron Artest also tweaked an ankle, but it wasn’t nearly as bad. Vujacic left the locker room on crutches. He rode in an electric cart to get from the locker room to his car, which was parked on the Staples Center loading dock. The Lakers also were without Kobe Bryant (ankle, finger, knee) and Andrew Bynum (Achilles tendon). Jordan Farmar played only 1.3 seconds at the end of the half after straining a hamstring Tuesday. Oh, and Luke Walton’s back stiffened up and he played only limited minutes in the second half.