The Mavericks have broken out their playoff beards. But they have proven to be hairy on only a temporary basis. Dirk Nowitzki has grown a full-fledged Pau Gasol-like beard, but at shootaround today, he promised it would be gone before tipoff. "I'm keeping the goatee,'' he said. "But the beard's going.'' Perhaps trying to stay in style, coach Rick Carlisle had a couple days' of stubble on his face. He said it was his playoff beard that would be gone before arriving at the arena for Game 5. Meanwhile, the Mavericks more pressing concern than facial hair is how they will respond tonight to what obviously will be a huge San Antonio stand. "We want to finish our business here and get on to the next series,'' Jason Terry said. "We know it's not going to be easy. They have the heart of a champion and they'll come out fighting. But we must impose our will.'' Terry added that the first few minutes will be critical. "We don't want to get behind,'' he said. "We tried that twice. It worked one time and the second time we got blew out. Fighting back, you have to expend too much energy. We know they're going to make a run and we have to withstand that run.'' As for his 3-of-17 shooting in Game 4, it's been completely forgotten. Terry also said that the Mavericks' level of aggression is more important to him than anything San Antonio does. "(Gregg) Popovich is a chess master,'' he said. "He's the best at making adjustments. His team seems to respond. But the key is for us to come out and play like it's a Game 7.''