Last year, Steve Kerr and the Warriors coaching staff were the worst in the league at challenging calls.

Golden State was successful on just 31.8 percent of the coach’s challenges, well below the league average of 59.2 percent. The Warriors were one of three teams to correct less than half of their challenges.

Apparently, their decision making showed flaws. So the Warriors added overhauling their strategy to their long offseason to-do list.

To streamline their challenge process, the Warriors want their players to be more discerning about whether to signal to the bench — by circling their index finger — for a review after a whistle. In the NBA, it might seem like players do the challenge move every time they get called for a foul.

But Kerr can’t trust his boys if they’re always crying wolf.

Beyond the trigger action of players being more selective when they head to the bench for an overhaul, the Warriors’ revamped strategy focuses primarily on one player: Draymond Green.

Kerr and the Warriors are off to a 4-for-4 start this season, with all four successful reviews canceling the fouls Green called. Most league-wide challenges come in the fourth quarter, but Green is such a valuable — and physical — player, the Warriors are comfortable blowing the horn for a boundary call at any point in the game, especially if it’s the his fourth or fifth personal. foul.

The first results are promising. Kerr is 4-for-5 to start the season — an 80 percent shooting percentage that would have led the league last year — and the Warriors have kept Green on the floor, where he’s been a dominant defensive presence.

“Our process is better,” Green said after the Warriors’ 104-89 win over New Orleans. “I saw that graphic this summer and it was like the head coaches … ‘Man, we were terrible.’ But our process wasn’t great. You made me cry there. You have BP there crying. Everyone just runs up and says, “Challenge her! Challenge!’ And we weren’t able to create a good process.”

Last year’s struggles with the replay review system weren’t for lack of effort. For years, Kerr did cooperated with his assistant coaches and video coordinators on the parameters for when and when not to sound the horn. Kerr wanted his staff to be decisive, thumbs up or down after a boundary call to signal whether they should call for a review or not.

This season’s success is emblematic of a more balanced team – at least for one week. Green caught himself several times, warning Kerr not to challenge a call on him because he knew the official was right. He said he noticed Brandin Podziemski doing the same.