Keith Smith: There is a saying that coaches love about long road trips: “If you’re going to go all the way there, you might as well win the game.” The Celtics did just that, overcoming a 22 point deficit in London. They did it in some loud ways with the great plays we’ve come to expect from Kyrie Irving, Jayson Tatum and Jaylen Brown. They did it in the more subtle ways, with Al Horford quietly doing his thing on the way to a really solid game.