Not only will the Philadelphia 76ers have to beat the Celtics four times in a row to advance, they will have to beat the odds as well.
The 76ers will have to do something no NBA team has ever done in coming back from a 3-0 deficit. 129 teams have tried and failed.
But coach Brett Brown says his team can be the first.
"Teams that are down 3-0 have a record of 129-0, now think about that," Brown said post-game.
"So just think about that number and the number to me (0) that happens more out of spirit than talent. Like there's a breaking point we all have and I believe that if we can maintain our spirit, why couldn't we be the one? And I mean that.
"That's my goal with us is to fight, to keep our mind believing in some of what I just said or I hope all of it and let their bodies recover and give us a chance. That's all I know, I can't see any other way to approach this that makes sense to me, so that's what we're going to do."
Brett Brown on history being against the Sixers, being down 3-0: "Why couldn't we be the one?" pic.twitter.com/IGXTWrNbaG- Sports Illustrated (@SInow) May 6, 2018
The Sixers led by as many as five points in the overtime period, but reckless turnovers and some huge late-game plays from Al Horford turned the game on its head and left the Sixers on the brink of elimination.
Their task is not impossible, but the way Brad Stevens has his squad rolling right now, they definitely have their work cut out for them.