PJ Washington was fouled when he blocked Derrick White on a pass to the hoop.
Washington immediately pointed the finger at the Dallas bench asking coach Jason Kidd to challenge, as he was certain it was all ball.
Sometimes players do that even when they've fouled the player, but the Mavs did a quick check and then called for a challenge.
There were no challenges in the first game, but on the face of it, it looks like Washington's foul could be overturned.
DAL 13, BOS 6 with seven minutes to go in Q1.