Game 1 was a resounding beatdown for the Mavericks. Unfortunately, it can get worse for them. After finishing with 20 points, 6 rebounds, and three huge blocks in his return, Kristaps Porzingis said, “I can add more.” Thursday night was a strong performance for the Celtics in their 107-89 blowout of the Mavericks in Game 1 of the Finals.