By Annie Ross

Julian Gressel and Josef Martinez scored as defending champion Atlanta United beat the Union 2-0 to advance to the Eastern Conference final.

United will host Toronto FC on next Wednesday night. Toronto beat top-seed New York City FC 2-1 on the road Wednesday night.

Pity Martinez, who returned to starting lineup after missing United’s first-round win over New England, came on a ball in about 35 yards in front of goal and sent a diagonal pass right ahead of Gressel. The ball entered the box ahead of Gressel, but he got to it before Philly goalkeeper Andre Blake and touched it left around him to the far post for the score.

The Union, which was missing leading scorer Kacper Przybylko because of a foot stress reaction, held the ball with 54 percent possession. Just three of their 10 shots were on goal, and Union’s best chance to score may have come in the 58th minute, when forward Jack Elliott’s near header off of a corner kick sailed over goal.

Gressel assisted on the Martinez goal, when the striker got forward down the left side and the curled a left footer into the top left corner of the goal, outside of Blake’s reach.

Blake kept the match close when he made consecutive saves on close-range headers by Franco Escobar and Gressel in the 61st minute.

The Union appeared fatigued down the stretch — they last played Sunday in a 120-minute overtime win over New York Red Bulls, while United played a regulation match Saturday. Union coach Jim Curtin used all three of his subs.