 Chicago missed out on a domestic treble (with the Supporters' Shield) when the Fire lost MLS Cup 2003.The Open Cup tournament was dominated by MLS squads, as only two non-MLS teams reached the quarterfinals.The Pro Select League's Wilmington Hammerheads were the story of the tournament, winning four straight games to reach the quarterfinals, including a 4-1 thrashing of MLS side Dallas Burn.