The Philadelphia 76ers and Boston Celtics. Two iconic franchises. One winner-take-all Game 7. It doesn’t get more old school than this.

After a stunning 106-93 victory in Game 6, the Sixers have pushed the Celtics to the brink. Everything is clicking for Philadelphia, while Boston is suddenly searching for answers. For the second-seeded Celtics, this is unfamiliar, uncomfortable territory. They have never lost a first-round series with Jayson Tatum and Jaylen Brown leading the way. They have never blown a 3-1 lead. But now, they face that very real possibility on their home floor Saturday.

The contrast between these two teams couldn’t be sharper right now. For Philadelphia, the game is flowing. Tyrese Maxey is thriving in space, exploiting Boston’s drop coverage in pick-and-roll situations. Paul George and Kelly Oubre Jr. have been relentless on the wings, making life difficult for Tatum and Brown. “I think in tandem me and him have been phenomenal on the wings,” George said.

For Boston, everything has become a struggle. The Celtics, who led the league in three-point attempts during the regular season, are suddenly getting run off the arc. Wide-open looks are disappearing. The ball movement has stalled, replaced by isolation plays and forced shots. Turnovers are piling up. Even their rebounding has faltered.

“They’ve made an adjustment on some of their stuff defensively,” Celtics coach Joe Mazzulla explained. “We have to find different ways to create against different coverages. Sometimes it’s harder to create, so we have to do it faster.”

The word that keeps coming up is “hesitant.” And for a team that played with such freedom all season, hesitation is a death sentence in the playoffs. Boston’s big lineup of Neemias Queta and Nikola Vučević has struggled to contain Maxey’s pick-and-roll game, leaving the Celtics vulnerable at every turn.

Now, it all comes down to one game. The Sixers have the momentum. The Celtics have the home court—and the weight of history pressing down on them. Game 7. Everything on the line. Just the way playoff basketball should be.