The competition is a knockout tournament with pairings drawn completely at random - there are no seeds. The draw also determines which team will play at home. If a match is drawn, there is usually a replay at the ground of the other team although it is possible for teams to agree in advance not to replay a tie in which case the initial match will be settled by means of extra time and penalty shootouts if necessary. Drawn replays are settled with extra time and penalty shootouts.