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LeBron James blew past a yellow-shirted defender, deked another with a dazzling behind-the-back dribble and threw dunk a rim-rattling dunk.

The Miami Heat were nearing the end of a 2½-hour practice Saturday when James punctuated it with a highlight play. Players and coaches say they're focused on the Philadelphia 76ers — a win in Game 4 at the Wells Fargo Center on Sunday would complete a sweep. Judging by the pace of practice at Saint Joseph's University, it seemed they were already gearing up for a showdown with the Boston Celtics in the Eastern Conference semifinals.

The Celtics also have a 3-0 lead in their first-round series against the New York Knicks. No team in NBA history has ever come back from such a deficit to win.