Atlanta United has set several attendance records in MLS, including the highest single-game attendance of over 72,000 fans.
Philadelphia Union has a strong youth development program and has produced several talented players who have gone on to play in Europe.
Atlanta United is known for their attacking style of play, led by star forward Josef Martinez who holds the record for most goals in a single MLS season.
Philadelphia Union's home stadium, Subaru Park, is located in Chester, Pennsylvania, while Atlanta United's home stadium, Mercedes-Benz Stadium, is located in downtown Atlanta, Georgia.
Both teams have passionate fan bases, with Philadelphia Union supporters known as the Sons of Ben and Atlanta United fans known as the Faction.