After RSL's 1-1 tie in the First Leg of the 2018 Western Conference Semifinals, here are the results Real Salt Lake needs to advance to the Western Conference Finals:
- A win.
- A tie where RSL scores 2 or more goals.
If Sunday's match in Kansas City ends as a 1-1 draw:
- Two 15 minute extra time periods will be played.
If the match is still tied at the end of extra time, the series would be decided by a penalty shootout.