Answered April 28th, 2019

Kyrie Irving posted 26 points and 11 assists in Boston's Game 1 victory - the first 25p/10a playoff game of his career and the first by a Celtics player on the road since Rondo in 2012.

Who was the last Celtics player with at least 25 points and 10 assists in a playoff game?
Interpreted as:
Who was the last Celtics player with at least 25 points and 10 or more assists in a playoff game?