NEW YORK -- The fans at the Barclays Center, most of whom were sporting green jerseys and T-shirts, had already serenaded Kyrie Irving with an MVP chant during fourth-quarter free throws. But the loudest cheers for the visiting squad were reserved for a sequence in the final minute when Jaylen Brown zipped an alley-oop lob to Jayson Tatum for an emphatic slam. Irving overcame frustration with his new protective mask to score a game-high 25 points, while Brown and Tatum paired up for 32 points as the Celtics won their 13th straight game? 109-102?over the host Nets. The streaking Celtics will host the defending-champion Warriors on Thursday night at TD Garden. In the aftermath of that late-game alley-oop, the remaining Nets fans were left to watch Brown and Tatum engage in a celebratory body-bump near midcourt. It was a painful reminder of what could have been. Both Brown and Tatum, along with Irving, were delivered to Boston by direct...