The Boston Celtics expected to have a three-headed monster entering the 2017-18 NBA campaign. And while the injury to Gordon Hayward altered that outlook, Thursday night showed the Celtics’ dynamic duo still is plenty lethal. Kyrie Irving and Al Horford always were going to need some time to develop chemistry, but it appears the two stars are well ahead of schedule after they combined for 51 points in the C’s 96-89 win over the Milwaukee Bucks at BMO Bradley Center. For the first time this season, Irving looked like the “Uncle Drew” from Cleveland, as he showed a variety of offensive moves, including a devastating crossover on Giannis Antetoko... NESN.com