We will learn a lot about the Boston Celtics in Monday's Game 4 of their first-round series against the Miami Heat. This is the one that a true championship contender should win — or cannot afford to lose.
For inability or immaturity, Boston has had a habit of letting go of the rope in its last two title pursuits. As the path to an 18th banner clears in front of them, the Celtics would be wise to make quick work of an undermanned Miami squad. They know all too well how playoff fortunes can change on these moments.