Schedule and 2022-23 Results:
Regular Season Records: Boston 57-25 Philadelphia 54-28
Game 1 on Monday, 01 May: Philadelphia wins at Boston, 119-pts-115
Game 2 on Wednesday, 03 May: Philadelphia loses at Boston, 121-pts-87
Game 3 on Friday, 05 May: Boston wins at Philadelphia, 114-pts-102
Game 4 on Sunday, 07 May: Boston loses at Philadelphia, 116-pts-115(OT)
Game 5 on Tuesday, 09 May: Philadelphia wins at Boston, 115-pts-103
Game 6 on Thursday, 11 May: Boston wins at Philadelphia, 95-pts-86
Game 7 on Sunday, 14 May: Philadelphia loses at Boston, 112-pts-88

SERIES NOTES:

After Game 7: The Boston Celtics hosted and bested the Philadelphia 76ers 112-pts-88 to complete a 4-games-3 best-of-7 MLB/NBA/NHL playoff series 1542 victory. With the series 1542 win, the Boston Celtics improve their best-of-7 NBA playoff series record to 74-31 overall and 24-8 in the Quarterfinals round. With the series 1542 loss, the Philadelphia 76ers see their best-of-7 NBA playoff series record fall to 24-31 overall and 9-16 (with an active seven-Quarterfinals series losing streak) in the Quarterfinals round. The win order for the victorious Boston Celtics in series 1542 was LWWLLWW: Series 1542 thus becomes the second NBA Quarterfinals-round series, the fourth NBA series (all rounds), and the 19th MLB/NBA/NHL series (all rounds) to follow that win order to completion. With their series 1542 Game 7 victory, the Boston Celtics improve their MLB/NBA/NHL-leading best-of-7 playoff Game 7 totals to 27 total Game 7 wins, 36 total Game 7 appearances, 22 home Game 7 wins, and 27 home Game 7 appearances. The Philadelphia 76ers scored only ten points in the third quarter of series 1542 Game 7: Those ten points are the fewest third-quarter points by one team in a best-of-7 NBA playoff game since series 1404, in which the visiting Indiana Pacers managed only eight third-quarter points (in Boston against the Celtics, no less) in Game 1 of their 2019 NBA Preliminary-round series en route to an 84-pts-74 loss to the Celtics.

After Game 6: The Boston Celtics visited and defeated the Philadelphia 76ers 95-pts-86 to knot best-of-7 MLB/NBA/NHL playoff series 1542 at 3-games-all. When tied 3-games-all in a best-of-7 MLB/NBA/NHL playoff series, the Boston Celtics have a Game 7 record of 26-9, while the Philadelphia 76ers have a Game 7 record of 5-9. The best-of-7 NBA playoffs Game 7 record for the Boston Celtics at home is 21-5, and for the Philadelphia 76ers on the road is 1-7; the sole 76ers Game 7 victory away from Philadelphia occurred in series 408 in the 1982 NBA Semifinals, over the Celtics in Boston. In the history of best-of-7 NBA playoff series, teams such as the Boston Celtics which post a LWWLLW @ HHVVHV win/site order have a 0-2 Game 7 record, with the latter loss by the 76ers in Philadelphia (in series 1475, to the visiting Atlanta Hawks in the 2021 NBA Quarterfinals): So it is that the 2021 Philadelphia 76ers offer an unfavorable precedent for the 2023 Boston Celtics against the 2023 Philadelphia 76ers.

After Game 5: The Philadelphia 76ers visited and bested the Boston Celtics 115-pts-103 to take a best-of-7 MLB/NBA/NHL playoff series 1542 lead of 3-games-2. When leading a best-of-7 MLB/NBA/NHL playoff series 3-games-2, the Philadelphia 76ers have a series record of 12-2 (with an active seven-series winning streak) and a Game 6 record of 7-7. When trailing a best-of-7 MLB/NBA/NHL playoff series 3-games-2, the Boston Celtics have a series record of 6-16 and a Game 6 record of 11-11.

After Game 4: The Philadelphia 76ers hosted and bested the Boston Celtics 116-pts-115(OT) to tie best-of-7 MLB/NBA/NHL playoff series 1542 at 2-games-all. When tied 2-games-all in a best-of-7 MLB/NBA/NHL playoff series, the Boston Celtics have a series record of 35-14 and a Game 5 record of 35-14, while the Philadelphia 76ers have a series record of 5-11 (with an active seven-series losing streak) and a Game 5 record of 5-11 (with an active seven-Game 5 losing streak). In all sixteen best-of-7 NBA playoff series in which the Philadelphia 76ers were knotted 2-games-all after four games, their Game 5 outcome has presaged their series outcomes (five wins, eleven losses).

After Game 3: The Boston Celtics visited and outscored the Philadelphia 76ers 114-pts-102 to take a best-of-7 MLB/NBA/NHL playoff series 1542 lead of 2-games-1. When leading a best-of-7 MLB/NBA/NHL playoff series 2-games-1, the Boston Celtics have a series record of 44-5 and a Game 4 record of 19-30. When trailing a best-of-7 MLB/NBA/NHL playoff series 2-games-1, the Philadelphia 76ers have a series record of 2-15 (with an active five-series losing streak) and a Game 4 record of 7-10. Leading a best-of-7 NBA playoff series with a LWW win order (as the Boston Celtics now do in series 1542), Boston has a 4-3 series record; trailing a best-of-7 NBA playoff series with a WLL win order (as the Philadelphia 76ers now do in series 1542), Philadelphia has a 1-2 series record. The series 1542 Game 3 loss by the Philadelphia 76ers ends their five-Game 3 winning streak in best-of-7 NBA playoff series.

After Game 2: The Boston Celtics hosted and defeated the Philadelphia 76ers 121-pts-87 to knot best-of-7 MLB/NBA/NHL playoff series 1542 at 1-game-all. When tied 1-game-all in a best-of-7 MLB/NBA/NHL playoff series, the Boston Celtics have a series record of 29-15 and a Game 3 record of 23-21, while the Philadelphia 76ers have a series record of 10-15 and a Game 3 record of 15-10 (with an active four-Game 3 winning streak). Irrespective of Game 1 outcome in a best-of-7 NBA playoff series, the Boston Celtics have seen their Game 2 outcome (a victory, in the case of the current series 1542) presage their series outcome in the last eleven such series (seven wins, four losses). Irrespective of Games 1-2 outcomes in best-of-7 NBA playoff series, the Philadelphia 76ers have an active five-Game 3 winning streak.

After Game 1: The Philadelphia 76ers visited and defeated the Boston Celtics 119-pts-115 to take a best-of-7 MLB/NBA/NHL playoff series 1542 lead of 1-game-nil. When leading a best-of-7 MLB/NBA/NHL playoff series 1-game-nil, the Philadelphia 76ers have a series record of 19-7 (with an active four-series winning streak) and a Game 2 record of 15-11. When trailing a best-of-7 MLB/NBA/NHL playoff series 1-game-nil, the Boston Celtics have a series record of 13-23 and a Game 2 record of 19-17. The Philadelphia 76ers trailed the host Boston Celtics by seven points as late as after one quarter but won: In the history of best-of-7 NBA playoff games from 1947 through 30 April 2023, inclusive, road teams down seven points as late as after one quarter had a game record of only 37-91 (.289) - the Philadelphia 76ers thus achieve a grade-C in-game comeback.

Pre-series assessment: In the 2022-23 NBA regular season, the Boston Celtics finished three games ahead of the Philadelphia 76ers. From 1947 through the 2023 NBA Preliminary round, when NBA teams led their best-of-7 playoff series opponents by three regular-season games, they have posted a best-of-7 playoff series record of 22-18 (.550) in those series against those opponents. MLB/NBA/NHL best-of-7 playoff series 1542 is the 105th best-of-7 NBA playoff series for the Boston Celtics, and the 55th for the Philadelphia 76ers. In best-of-7 NBA playoff series, the Boston Celtics have an all-rounds series record of 73-31, a Quarterfinals-round series record of 23-8, and a Game 1 record of 68-36, while the Philadelphia 76ers have an all-rounds series record of 24-30, a Quarterfinals-round series record of 9-15 (with an active six-Quarterfinals series losing streak), and a Game 1 record of 26-28. Series 1542 is the 14th best-of-7 NBA playoff series meeting between the Boston Celtics and the Philadelphia 76ers. The Boston Celtics won nine of their previous thirteen best-of-7 NBA playoff series with the Philadelphia 76ers, including the last four such series. The last best-of-7 NBA playoff series in which the Philadelphia 76ers defeated the Boston Celtics was series 408, in which Philadelphia topped Boston in the 1982 NBA Semifinals in seven games. In best-of-7 NBA Quarterfinals series, the Philadelphia 76ers have an active eleven-Game 1 losing streak and (within best-of-7 NBA Quarterfinals) have an active six-series losing streak. Irrespective of round, the Philadelphia 76ers have seen their Game 1 result presage their series result in their last seven best-of-7 NBA playoff series (three wins, four losses).