HOW DOES IT WORK. Round of 16 in a single match, as already happened in the preliminary round, thirty-second and sixteenth. If there is a tie in the 90 ‘there will be extra time and, possibly, penalties. Round-trip semi-finals. The away goal rule applies (also in any extra time), then eventually the penalties. The final is in a single match at the Olimpico: if there is a tie in the 90 ‘there are overtime and, possibly, penalties.