Chances are that if you’ve made this far, you already know how big of a deal today’s Concacaf Champions League match potentially is for both the Seattle Sounders and MLS. A win wouldn’t just be the crowing achievement for the league’s most successful team over the past decade-plus, but a clear and real sign that MLS is closing the gap with Liga MX in a meaningful way.

But even if you already understand all of that, there are a few things that could have easily slipped through the cracks. Here’s everything you need to know about tonight’s game to be fully up to speed (and hopefully able to impress some of your buddies):

We’re basically starting from scratch

Thanks to the lack of an away-goals tiebreaker and the fact that the first leg ended in a tie, this is effectively a one-game final.