2018 FIFA World Cup qualification – UEFA second round

The UEFA second round was contested by the best eight runners-up from the nine first round groups from the UEFA segment of the qualification tournament for the 2018 FIFA World Cup final tournament. The winners — Croatia, Denmark, Sweden, and Switzerland — of each of four home and away ties joined the group winners in the World Cup in Russia.

Source: Wikipedia — 2018 FIFA World Cup qualification – UEFA second round (CC BY-SA 4.0)