New York vs. Philadelphia In the Postseason

The New York Knicks won their 1st Round Playoff series, beating the Atlanta Hawks in 6 games, winning Game 6 by a Playoff-record-setting margin.

The Philadelphia 76ers won theirs, beating their arch-rivals, the Boston Celtics, in a Game 7 in Boston. Truly an epic achievement.

The Knicks and Sixers will now play each other in the NBA Eastern Conference Semifinals. They haven't been to the NBA Finals since 1999 and 2001, respectively. They haven't won an NBA Championship since 1973 (Knicks) and 1983 (76ers).

New York vs. Philadelphia In the Postseason

1905 World Series: New York Giants beat Philadelphia Athletics

1911 World Series: Athletics beat Giants

1913 World Series: Athletics beat Giants

1947 BAA Semifinals: Philadelphia Warriors beat New York Knicks

1950 World Series: New York Yankees beat Philadelphia Phillies

1968 NBA Eastern Division Semifinals: Philadelphia 76ers beat Knicks

1974 Stanley Cup Semifinals: Philadelphia Flyers beat New York Rangers

1975 Stanley Cup Semifinals: Flyers beat New York Islanders

1977 NBA Eastern Conference Semifinals: 76ers beat Knicks

1979 Stanley Cup Quarterfinals: Rangers beat Flyers

1979 NBA Eastern Conference 1st Round: 76ers beat New Jersey Nets

1980 Stanley Cup Quarterfinals: Flyers beat Rangers

1980 Stanley Cup Finals: Islanders beat Flyers

1981 NFC Wild Card Playoff: Philadelphia Eagles beat New York Giants

1982 NHL Patrick Division Semifinals: Rangers beat Flyers

1983 NHL Patrick Division Semifinals: Rangers beat Flyers

1983 NBA Eastern Conference Semifinals: 76ers beat Knicks

1984 NBA Eastern Conference 1st Round: Nets beat 76ers

1985 NHL Patrick Division Semifinals: Flyers beat Rangers

1985 NHL Patrick Division Finals: Flyers beat Islanders

1986 NHL Patrick Division Semifinals: Rangers beat Flyers

1987 NHL Patrick Division Semifinals: Flyers beat Rangers

1987 NHL Patrick Division Finals: Flyers beat Islanders

1989 NBA Eastern Conference 1st Round: Knicks beat 76ers

1995 NHL Eastern Conference Semifinals: Flyers beat Rangers

1995 NHL Eastern Conference Finals: New Jersey Devils beat Flyers

1997 NHL Eastern Conference Semifinals: Flyers beat Rangers

2000 NHL Eastern Conference Finals: Devils beat Flyers

2000 NFC Divisional Playoff: Giants beat Eagles

2004 NHL Eastern Conference Quarterfinals: Flyers beat Devils

2006 NFC Wild Card Playoff: Eagles beat Giants

2008 NFC Divisional Playoff: Eagles beat Giants

2009 World Series: Yankees beat Phillies

2010 NHL Eastern Conference Quarterfinals: Flyers beat Devils

2012 NHL Eastern Conference Semifinals: Devils beat Flyers

2014 NHL Eastern Conference Quarterfinals: Rangers beat Flyers

2018 MLS Cup Knockout Round: New York City FC beat Philadelphia Union

2019 NBA Eastern Conference 1st Round: 76ers beat Nets

2019 MLS Cup 1st Round: Union beat New York Red Bulls

2020 Stanley Cup 2nd Round: Islanders beat Flyers

2021 MLS Cup 1st Round: Union beat Red Bulls

2021 MLS Cup Eastern Conference Finals: City beat Union

2022 NFC Divisional Playoff: Eagles beat Giants

2022 MLS Cup Eastern Conference Finals: Union beat City

2023 NBA Eastern Conference 1st Round: 76ers beat Nets

2024 NBA Eastern Conference 1st Round: Knicks beat 76ers

2024 National League Championship Series: New York Mets beat Phillies

2025 MLS Cup Eastern Conference Semifinals: City beat Union

Note: For soccer, I counted only Major League Soccer. I would have counted the North American Soccer League, but the New York Cosmos and the Philadelphia Atoms never played each other in the Playoffs. Nor did the Cosmos and the later Philadelphia Fury. I did not count the U.S. Open Cup, because that's an in-season tournament, not postseason.

MLB: New York, 4-2

NFL: Philadelphia, 4-1

NBA: Philadelphia, 7-3

NHL: Philadelphia, 11-10

MLS: Tie, 3-3

TOTAL: Philadelphia 27-21.