The Dash were definitely underdogs for the competition, having never before qualified for the NWSL playoffs - their previous highest finish coming back in 2015 when they ended the season in fifth place.
It is bound to be a tight match between two sides who have both averaged a goal in each of their games so far.
Chicago Red Stars: Naeher; Goralski, St.Georges, Ertz, Gorden; Colaprico, DiVernardo, McCaskill; Johnson, Gill, Ohai Watt
Houston Dash: Campbell; Hanson, Prisock, Naughton, Chapman; Groom, Mewis, Schmidt; Visalli, Daly, Prince
Ones to watch
Chicago Red Stars - Rachel Hill
Before Thursday's semi-final, the Red Stars had only scored three in their previous five matches, with that record now at six in six.
After Sam Kerr departed at the end of the 2019 season to join Chelsea, it was always going to be difficult for the Red Stars to be able to fill the void left by the loss of their main goalscoring outlet. If they are to be able to score on Sunday, Hill may be able to provide that threat.
The Red Stars lost out in last year's final when they played the North Carolina Courage, could they pick up their first NWSL victory on Sunday?
Houston Dash - Rachel Daly
Dash vice-captain Rachel Daly is the joint top scorer across the competition with three goals to her name so far, level with the Courage's Lynn Williams. She has also picked up one assist during the Challenge Cup.
The 28-year-old is currently playing for her fourth year in Houston after she originally joined the Dash back in 2016 and will be looking to pick up domestic silverware for the first time since she moved to the USA.
She was the sole scorer against the Portland Thorns in the semi-final, netting for the Dash in the 69th minute.
She has been a crucial element of her side during the Challenge Cup, will she prove to be the difference in the final?
The Chicago Red Stars were 3-0 victors against the Houston Dash when they last played back in September
Where to watch on TV and Stream
In the USA and Canada, the game will be able to watch on CBS.
For those who are outside of the USA, as has happened with all of the other Challenge Cup games, the match will be available to watch on the official NWSL twitch channel.
There will be LIVE updates of the match available on VAVEL.com