For Ireland and Wales, their game against each other on Sunday will act as a straight knockout game, with the winner taking the remaining automatic spot for the World Cup in three years' time.
France became the ninth team to qualify for the 2021 World Cup after winning their first two games against Wales and Ireland to secure a top-two qualification spot with a game to spare.
They will win the European Championship if they avoid defeat against Scotland on Saturday in Carcassonne.
Scotland and Sunday's losers will still have a chance to qualify for the tournament when they join four other European hopefuls in the last qualifying stage. Find out more about that below.