Isaiah Thomas scored 27 points , Marcus Smart made a tiebreaking 3 - pointer with 47 seconds left after Boston blew a late lead .
The Boston beat New York , 119 - 114 , on Sunday .
Isaiah Thomas scored 27 points , Marcus Smart made a tiebreaking 3 - pointer with 47 seconds left after Boston blew a late lead , and the Celtics beat New York , 119 - 114 , on Sunday .