Celtics ride high into matchup with determined Cavaliers

(Photo credit: David Butler II-USA TODAY Sports)
The top-seeded Boston Celtics will open their Eastern Conference semifinal series on notice, as they face opponent that already has expressed it has more to prove.

The well-rested Celtics and the stretched-to-the-limit Cleveland Cavaliers each will attempt to draw first blood when Game 1 gets underway Tuesday at Boston.

Boston advanced by beating eighth-seeded Miami in fi