The Boston Celtics dug themselves too deep of a hole Wednesday night in Miami, and despite a valiant effort late in the fourth quarter, they couldn’t extend their win streak to 17 games after a 104-98 loss to the Heat. Boston had overcome deficits of 10 or more in three straight games entering Wednesday. The C’s clawed back from deficits of 18 (twice), 17, 16 and 13 during the win streak, but Heat guards Goran Dragic and Dion Waiters, who combined for 53 points, were too much to handle late in the game. The 16-game win streak is tied for the fourth-longest in team history. It included a nine-game road win streak (fifth-longest in franchise