There is little that is pretty about playing defense. It takes sweat, hustle and commitment. And on the Bulls, you can often add hoarse-voiced screaming from coach Tom Thibodeau to the equation. Nevertheless, when the Bulls defend like they did in Game 1 of the Eastern Conference finals on Sunday night, sweat equity can be a beautiful thing. The Bulls absolutely suffocated the Heat in the second half of their 103-82 victory at a United Center in full throat, holding first serve in the best-of-seven series that continues here Wednesday night. In the waning minutes, the sellout crowd started chanting "Overrated!" at the Heat. "We were locked in," Joakim Noah said afterward. "When you have everybody on the same page with that kind of intensity, it's fun. But we're not satisfied with one win. There's still a lot we can improve on." Perhaps not at the defensive end. How dominant was it?