Chicago won their first road point all season on Sunday at Philadelphia playing with 10 men for most of the game. So they're probably feeling pretty good, but this also could be a let-down game for them, and they might be physically and emotionally exhausted.
The other thing I want to say is I watched the replay of the DOGSO red on Sunday, which was described as possibly very soft. The teams wore (effectively) white and black uniforms, because this is 2021 and that's what we do. So watching the play I had no idea who was who. And it was not until watching it again a day later that I realized I thought the attacker was the defender and vice-versa. I originally thought it was a soft foul; when I found out I had the roles reversed it was extremely soft. The Fire was done wrong, but they rallied effort and it worked out for them. But who knows how they will react the next game.