Before the Knicks flew to Boston after Thursday’s practice, Knicks center Tyson Chandler compared the feelings in Beantown to the heartache felt in the aftermath of Hurricane Sandy in late October. The Knicks face the Celtics on Friday in Game 3 – marking the first home game the Celtics will play since the Boston Marathon bombings on April 15th. “If anybody knows struggle and tragedy, it’s the city of New York,’’ Chandler said. “We understand very well what they’re going through. We expect them to play with pride for their city. They’ve been doing it. These games haven’t been easy. They’ve been no walk in the park. I expect the same thing in Boston.” Knicks coach Mike Woodson has talked about the key to Friday being not to be caught up in “the hoopla.’’ The Knicks lead the series 2-0 after holding Boston to 25 and 23 points, in the second half, respectively, in the first two games . “It’s one the toughest places to win on the road,’’Kidd said. “They get behind the guys, it gets extremely loud in there. We’re going to have our hands full.’’