An '''upset''' occurs when a large [[underdog]] wins a match outright.The most notable upsets occur when teams that have positive [[point spread]]s larger than 20 defeat the [[favorite|favored team]]. One of the most historic upsets in history was when 16th seed UMBC Retrievers defeated the 1st overall Virginia Cavaliers in the opening round of the 2018 NCAA Division I Men's Basketball tournament. UMBC closed as +20.5 underdogs and nearly covered the [[reverse spread]]. {| class="wikitable" style="text-align: center;"|- style="background-color:#eaecf0;"|'''Seed'''|colspan="2"|'''Team'''|'''1H'''|'''2H'''|'''Total'''|-|16|[[File:UMBC.png|25px]]|UMBC Retrievers|21|53|style="background-color:#eaecf0"|'''74'''|-|1|[[File:Virginia.png|25px]]|Virginia Cavaliers|21|33|style="background-color:#eaecf0"|'''54'''|}