The Cavs took control of the series, but they nearly let it slip through their fingers due to a rare lapse in defensive effort. It's a lesson learned.

Donovan Mitchell scored 30 points, including 17 in the fourth quarter, and the Cleveland Cavaliers held on for a 121-112 victory over the Miami Heat on Wednesday night for a 2-0 lead in their Eastern Conference first-round series.

In a fourth quarter to remember, Donovan Mitchell was the only Cavaliers player to make a field goal for nearly 12 minutes. His epic performance gave Cleveland a crucial edge in the series.