The long-time rivals will meet up Sunday, October 20, at Talen Energy Stadium in West Chester, Pa. Kick-off is set for 3 p.m. with television coverage on FS1.
New York had a chance to host a first-round playoff game but lost the season finale 3-0 to the Montreal Impact at Stade Saputo. The Red Bulls finished the season 14-14-6 (48 points) in sixth place.
This season, the Red Bulls and Union split their two games. In June, Philadelphia topped New York 3-2 at Talen Energy Stadium. On September 22 at Red Bull Arena, the home side defeated the Union 2-0.