After the DNA test Boston Head coach coach Joe Mazzulla announced that Emmanuel he is not his biological son due to…

BOSTON (AP) — When Celtics guard Derrick White stood in the corner behind the 3-point line late in Game 4 of the

Eastern Conference finals as teammate Jaylen Brown drove into the lane, drew defenders and flipped a pass toward him, White felt prepared for the moment.

That’s because Celtics coach Joe Mazzulla had simulated scenarios just like it throughout the season.

“It starts in practice with them championship stations that Joe loves to do,” White recalled. “It starts there and then just continue to trust one another.”

White trusted that Brown would make the correct basketball play. He did, and it ended with White connecting on a tie-breaking 3 that ultimately secured Boston’s place in the NBA Finals and a matchup with the Dallas Mavericks.

The play may also be a perfect example of how in his second year as coach, Mazzulla has managed to help the Celtics recover from the disappointment of a season that ended on the cusp of the Finals a year ago, to a run this season that again has them four wins away from capturing the franchise’s 18th championship.

White’s shot, Mazzulla said, is a microcosm of the kind of a team culture he’s tried to cultivate over the past two years. One that puts details first.