The 76ers' Paul George, left, chases a loose ball past the Boston Celtics' Neemias Queta during the second half of Game 6 of their first-round NBA playoff series on Thursday in Philadelphia. (AP photo)

BOSTON — The Celtics appeared to be skipping toward the second round of the NBA playoffs following a 32-point road win in Game 4 at Philadelphia.

But back-to-back convincing wins by the 76ers in Game 5 and Game 6 have left a Boston team that once looked like a favorite to emerge from the Eastern Conference on the brink of an epic collapse.

A loss in tonight’s Game 7 would be the No. 2 seed Celtics’ earliest exit from the playoffs since the 2020-21 season.

They may have to do it with star Jayson Tatum dealing with a new ailment after he briefly left Game 6 in the third quarter for unspecified treatment to an apparent left calf injury. Tatum, of course, is just 22 games into his return from the torn right Achilles tendon injury he suffered in last season’s playoffs.

The Celtics downplayed the current situation, with Tatum saying afterward that his leg was only feeling “a little stiff.” He said following a quick assessment and some time on the exercise bike he didn’t return because the game was out of hand and the starters had already been pulled.

Coach Joe Mazzulla said there was no injury at all and reiterated that in a conference call Friday.

“He’ll play,” Mazzulla said.

The recent history for winner-takes-all games for Philadelphia teams isn’t exactly on the 76ers side, though.

The Flyers’ return to the NHL playoffs served as a reminder they are the last Philadelphia sports team to win a Game 7, beating, yes, Boston, in the 2010 Eastern Conference semifinal.

Since then, the 76ers in 2012, 2019, 2021 and 2023 have all lost Game 7s; the Flyers lost one in 2014 and 2020; and the Phillies lost Game 7 of the NLCS in 2023.

The Phillies also lost a decisive Game 5 in the 2011 playoffs.

Philadelphia at Boston

When: Game 7, 7:30 p.m. EDT, NBC/Peacock

Series: Series tied 3-3

Betting line: Celtics by 7.5

What to Know: The Celtics are 27-10 all-time in Game 7s, the 76ers are 6-12 in such games and are 0-4 in them since 2001. It’ll be the ninth Game 7 between these two franchises, with Boston going 6-2 previously. Philadelphia is the 37th team in league history to force a Game 7 after trailing 3-1. Only 13 teams have overcome that deficit and won the series. If Boston is going to prevent the 76ers from becoming the 14th, its shooting must improve. The 76ers have held the NBA’s No. 2 rated offense during the regular season to under 100 points per game in back-to-back games.

___

AP Sports Writer Dan Gelston contributed.

___

AP NBA: https://apnews.com/NBA