Ben Simmons’ debut with the Nets will not come in their first elimination game against the Celtics.

Trailing their first round playoff series 3-0 following Saturday’s loss at Barclays Center, the Nets have listed Simmons as out for Monday’s game on their official injury report.

Simmons, the three-time All-Star who hasn’t played since the Nets acquired him from the 76ers in February due to a herniated disk in his back, had targeted Monday’s Game 4 after joining his teammates in practice in recent days.

However, according to ESPN, Simmons woke up Sunday with back soreness again.

Nets coach Steve Nash said after practice Sunday that he had “no idea” if Simmons would play, but he indicated that it might not be fair to Simmons or the rest of the team to put him in that situation for his first game since the playoffs last June.

“That’s a good question,” Nash said. “Part of the decision has to be Ben’s. I think that he has to be all-in. And so that is a part of the equation, that’s fair. It’s not all on Ben. It’s not like, ‘Ah, come on, you didn’t play Ben.’ This is a unique situation. He’s never played with his teammates. And to go into a playoff situation after a long period of inactivity and injury is not straightforward.”