In pictures: Philadelphia Union 2-2 Chicago Fire

Philadelphia Union forward Julián Carranza (9) and Chicago Fire defender Allan Arigoni (27) leap to battle for a head ball chance.

Philadelphia 76ers player Cam Payne ignites the crowd at Subaru Park with Philadelphia Union mascot Phang after he strikes the drum to start out the match.

Philadelphia Union defender Damion Lowe (17) and Chicago Fire midfielder Xherdan Shaqiri (10) battle for the ball.

Chicago Fire defender Andrew Gutman (15) reacts after suffering an injury.

Philadelphia Union defender Kai Wagner (27) heads the ball as Chicago Fire defender Allan Arigoni (27) tries to challenge him.

Philadelphia Union fan waves a flag in support.

Philadelphia Union midfielder José Martínez (8) reacts after being shoved by Chicago Fire forward Fabian Herbers (21).

Philadelphia Union defender Kai Wagner (27) kicks the ball while facing off against Chicago Fire midfielder Maren Haile-Selassie (7).

Philadelphia Union players express frustration with referee’s call.

Philadelphia Union midfielder Dániel Gazdag (10) heads the ball as Chicago Fire midfielder Xherdan Shaqiri (10) looks on.

Philadelphia Union midfielder José Martínez (8) takes control of the ball while Chicago Fire midfielder Xherdan Shaqiri (10) attempts to take it from him.

Philadelphia Union fans react after a failed Union goal attempt.

Chicago Fire defender Allan Arigoni (27) goes for a pass while Philadelphia Union defender Kai Wagner (27) tries to stop him.

Philadelphia Union defender Damion Lowe (17) and Chicago Fire forward Hugo Cuypers (9) battle for possession of the ball.

Philadelphia Union defender Kai Wagner (27) jumps to head the ball while his teammate Jack McGlynn (16) tries to take control.

Chicago Fire players celebrate after scoring a goal against the Philadelphia Union.

Philadelphia Union defender Jakob Glesnes and Chicago Fire forward Hugo Cuypers (9) compete for a header.

Philadelphia Union defender Nathan Harriel (26) celebrates.

Philadelphia Union midfielder Dániel Gazdag (10) takes control of the ball before scoring a game-tying goal.

Philadelphia Union defender Nathan Harriel (26) celebrates with teammate Jack McGlynn (16).

Chicago Fire midfielder Xherdan Shaqiri (10) battles with Philadelphia Union midfielder Jack McGlynn (16).

Chicago Fire defender Chase Gasper (77)
slides in to stop Philadelphia Union midfielder Quinn Sullivan (33).

Philadelphia Union defender Nathan Harriel (26) celebrates with teammates Jack McGlynn (16) and Quinn Sullivan (33).

Chicago Fire defender Chase Gasper (77)
slides in to stop Philadelphia Union midfielder Quinn Sullivan (33).

Philadelphia Union midfielder José Martínez (8) heads the ball.

Philadelphia Union defender Nathan Harriel (26) celebrates with teammate Kai Wagner (27).

Philadelphia Union defender Damion Lowe (17) is challenged by Chicago Fire forward Hugo Cuypers (9).

Philadelphia Union midfielder José Martínez (8) and teammate Nathan Harriel (26) celebrate after a pass that led to a game-tying goal by Daniel Gazdag (10) against Chicago Fire.

Philadelphia Union midfielder José Martínez (8) prepares for a pass.

Chicago Fire forward Thomas Barlow (12) and Philadelphia Union midfielder José Martínez (8) prepare to jump for the ball.

Philadelphia Union midfielder Dániel Gazdag (10) reacts after suffering an injury.

The crowd of fans at Subaru Park braved the cold to cheer on the Philadelphia Union as they kicked off their 2024 MLS season against the Chicago Fire at Subaru Park.