Game 4 at Indiana is going to be the most important game of this series for the Knicks. After a disastrous Game 3 that lacked everything but bricks for New York, facing elimination the rest of this series would almost surely demoralize the playoff-slumping Knicks. With Amar'e back and hopefully able to provide more desperately needed offensive pressure on Indiana, the Knicks need to spread the floor offensively, watch their shot selection, and they can not let Roy Hibbert beat them on their front court.
Individually, Tyson Chandler may be an all-first team defenseman, but he's struggled heavily this series. Carmelo Anthony's struggles seem to be coming to an end, but whether he'll ever return to his efficient capability is yet to be seen. JR Smith's shot is more lost than a Charlotte fan at a playoff game. As for Raymond Felton, Game 3 was simply a bizarre (non)performance after Felton had been so successful this postseason in punching in the paint. Even Mike Woodson, whose decision to hardly play Chris Copeland (0:58, 1-1, 3pts) while the rest of his players couldn't sink anything.
If (obviously) these players can get their heads back into the game and play like they had during the regular season, the Knicks can absolutely come back in this series. And I personally, would strongly suggest to Woodson playing Copeland more in what should be treated as a must-win game for New York.