After faltering in the opener of their Eastern Conference first-round playoff series against the New York Knicks, the Detroit Pistons showed maturity and toughness in their response. After Thursday’s letdown in Game 3, they will have to dig even deeper to stay in the fight.The Pistons host the Knicks in Game 4 on Sunday with New York holding a 2-1 edge in the best-of-seven series.”We won’t be deflated,” Pistons coach J.B. Bickerstaff said. “Our guys are too committed to one another. We’ll show up Sunday and we’re going to lay it on the line. We’re going to fight like hell and see what happens.”Bickerstaff needs his team to carry its late-game performance from Thursday into Game 4.”I think we were good in the second half,” Bickerstaff said. “I thought we did a really good job defensively. It allowed us to get out in transition, play the way we want to play offensively, so we just continue to build off of that.”Unlike the first two games, where Detroit controlled the first three quarters in each contest, the Pistons struggled most of Game 3 and had to battle back from a 14-point deficit in the 118-116 loss.”We competed, we battled, and they did their job,” said Pistons guard Tim Hardaway Jr., who had 24 points along with Cade Cunningham. “So we’ve got to come back on Sunday and be ready.”Cunningham said the Pistons are learning the importance of being aggressive at the start.”That’s what we have to do every game — come out punching,” Cunningham said. “Come out with aggression.”That’s exactly what the Knicks did — especially center Karl-Anthony Towns, who led New York with 31 points following just 10 points in Game 2.