The play-offs are played in home-and-away two-legged format. The two play-off winners qualify for the final tournament.[2]
Ranking of second-placed teams
To determine the four best second-placed teams from the qualifying group stage which advance to the play-offs, only the results of the second-placed teams against the first, third, fourth and fifth-placed teams in their group are taken into account, while results against the sixth-placed team (for groups with six teams) are not included. As a result, eight matches played by each second-placed team will count for the purposes of determining the ranking.[3]