Philadelphia, meanwhile, continues to run into problems at home.
These teams meet for the second straight Saturday, with the Union winless in their last three at home and the Fire searching for their first road victory.
Chicago (2-6-1) finished with a 15-9 advantage in overall shots and 6-2 edge in shots on goal in last Saturday’s 1-0 home loss to Philadelphia.
“You look at games like this, and you’re scratching your head how we lost a game like this,” Fire coach Frank Klopas said.
Jack McInerney scored his MLS-leading seventh goal for the Union, tallying in the 75th minute or later for the fourth time.
Any momentum from that victory for Philadelphia (4-4-3) was halted Wednesday in a 4-1 home loss to Los Angeles. The Union have conceded 10 goals in five games at home while yielding eight in six on the road.
“I think our mentality might be a little tougher on the road, and we’re trying to push things at home,” coach John Hackworth said. “That game opened up a lot, which hasn’t been something we’ve been good at. We keep it a little tighter on the road.”
Philadelphia has two draws and a defeat in its last three at home while Chicago has been outscored 8-1 in going 0-3-1 on the road.
Klopas will welcome the return from suspension of midfielder Jeff Larentowicz, who had played every minute until he was sent off in the 63rd minute of a 2-0 loss at Montreal on April 27.
Larentowicz grew up in Philadelphia, where the Chicago newcomer is 2-0-1 with a score.
“My immediate family goes to a lot of games on the east coast but this one’s extra special because it brings a lot of people out,” he told the Fire’s official website.
The Union played last Saturday’s contest without a suspended Sheanon Williams, and the defender’s return Wednesday didn’t help stop their poor home play. Amobi Okugo scored a first-half goal for Philadelphia, which felt that it was controlling the action before conceding the game’s final three tallies over the last 19 minutes.
“When we have them against the ropes, we gotta capitalize, whether it’s getting a goal, punishing them, don’t give them any hope,” Okugo said. “We’ve got to put these games away.”
Klopas is sticking with the tactical change he made last weekend when he moved Patrick Nyarko up top to pair with Chris Rolfe to try to inject life into his club’s offense. The coach was happy with what he saw, and Nyarko says he is adjusting to the new role.
“Out wide, you know exactly what you want to do, you know the matchups and stuff like that but up top, it’s different,” Nyarko said.
Maicon Santos, who has a team-high two goals, continues to be limited to a substitute’s role due to knee problems.
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