Time: 7:30 p.m. EDT
Venue: PPL Park, Chester, Pa.
TV: The Comcast Network (J.P. Dellacamera, Alejandro Moreno and Heather Mitts, with Tony Limarzi, Peter Pappas and Ian Munro at the on-site studio desk)
Philadelphia Union (4-1-3-2, left to right)
Goalkeeper: Zac MacMath
Defenders: Raymon Gaddis, Bakary Soumaré, Amobi Okugo, Sheanon Williams
Midfielders: Brian Carroll; Danny Cruz, Kléberson, Michael Farfan
Forwards: Sébastien Le Toux, Jack McInerney
Bench: GK Chris Konopka; D Chris Albright; Ms Keon Daniel, Leo Fernandes, Roger Torres; Fs Conor Casey, Antoine Hoppenot
Chicago Fire (4-4-1-1, left to right)
Goalkeeper: Sean Johnson
Defenders: Gonzalo Segares, Austin Berry, Jalil Anibaba, Wells Thompson
Midfielders: Joel Lindpere, Jeff Larentowicz, Logan Pause, Dilly Duka
Forwards: Chris Rolfe, Patrick Nyarko
Bench: GK Paolo Tornaghi; Ms Alex, Corben Bone, Brendan King, Michael Videira; Fs Quincy Amarikwa, Sherjill MacDonald
Referee: Allen Chapman
Assistants: Eric Boria (bench side), Kevin Klinger (opposite side)
Fourth Official: Kevin Terry, Jr.
In addition to updates from PPL Park, you'll also be able to get updates from all of the other games going on in MLS today. If you're on a mobile device, click here for the console.