Since the creation of the J.League in 1992, the professional teams have dominated the competition, although doubles, once common in the JSL, have become very rare. However, because the Emperor's Cup is contested in a knockout tournament format, the opportunity for "giant-killers" from the amateur ranks upsetting a top J.League squad is a very real possibility. For example, a major upset almost occurred in the 2003/04 competition, when Funabashi Municipal High School took the 2003 J.League champion Yokohama F. Marinos to a penalty shootout. Although Waseda University was the last non-league winner in 1966, and the previous non-top tier winner was in 2011 (contested by two second-tier teams, FC Tokyo and Kyoto Sanga, with FC Tokyo winning 4–2).