Photo courtesy of Philadelphia Union's Twitter account.
Andre Blake and Kacper Przybylko were the stars as the Union put one foot into the CONCACAF Champions League semi-finals.
A second-half brace from Przybylko and a late third from Anthony Fontana gave Philadelphia an unlikely 3-0 win away at the Mercedes-Benz Stadium.
Przybylko's first came from a Kai Wagner corner as his cross towards the front post was flicked into the path of the striker, who slotted home at the back post. The forward grabbed his second in the 72nd minute, thanks to the hard work of Leon Flach. The midfielder regained possession and led the break towards the goal before laying it across to Przybylko, who slotted it past Brad Guzan.
Fontana's goal came from the unselfish Przybylko, who allowed the midfielder an open goal to pass into to make it three as opposed to going for the hat-trick.
Jim Curtin made one change from the side that lost to Inter Miami at the weekend, as Cory Burke made his first start of the season and Sergio Santos dropped to the bench.
Atlanta United star forward Josef Martinez led the line for the hosts as they hoped for a first-leg lead.
Andre Blake did brilliantly denying Jurgen Damm in the sixth minute. The right-back got in behind the Union defence and had the goal at his mercy. He was met by the onrushing Blake, who quickly closed him down and did well to get a strong foot on the shot.
The visitors struggled for possession during the early stages of the game as Atlanta had them pinned inside their own half. However, Philadelphia stood strong against the storm, only giving the hosts half chances.
In the 32nd minute, Emerson Hyndman came close. A United corner went out as far as the midfielder who struck it on the half-volley first time. It took an acrobatic save by Blake to push it over the crossbar to deny the midfielder.
Blake was the Union hero again just minutes later. Marcelino Moreno was played through on goal by Martinez, and the winger was