NBA schedule: Celtics, Bulls square off in East showdown

An Eastern Conference slugfest between the Celtics and Bulls highlights Friday's NBA slate. When the Oklahoma City Thunder and Dallas Mavericks square off on Friday night at the American Airlines Center in Dallas, one of the two longest active winning streaks in the NBA must come to an end. Kevin Durant and the Thunder have stacked up five straight wins to maintain the best record in the association, while the Mavericks have mounted a climb towards .500 with four straight victories. The Thunder ...