Ties are allowed to stand in most forms of cricket, but should a winner be necessary (such as in tournament settings), the most commonly used tiebreaking method is the Super Over, which is a limited extra session of the game wherein each team plays an additional six balls (six plays, together known as an over) to determine the winner. Tied Super Overs may be followed by another Super Over in some matches, such as (since 2008) the knockout matches of International Cricket Council tournaments. The Super Over originates from Twenty20 cricket, and has been used several times in Twenty20 International games; its first use in a One-Day International was the 2019 Cricket World Cup Final, wherein the Super Over was tied, and the winner then had to be determined by boundary countback (a statistical tiebreaker). Following this event, the ICC changed the rules of its knockout matches so that tied matches continue until one team wins a Super Over.