A 2-1 win against Costa Rica booked Panama's first World Cup berth in the nations history.
With arguably the strongest squad in the tournament, Belgium are expected to contend for the title.
South Korea scraped into the 2018 tournament, behind the play of Son Heung-min.
Sweden beat Italy 1-0 on aggregate in the playoffs to secure their spot in the 2018 World Cup
Mexico topped both of their qualifying groups but there are still doubts over the team.
The 2014 champions will be looking to repeat that success in Russia, and they have the squad to do it.
Costa Rica played well to qualify, but it is unlikely they will repeat their 2014 heroics.
2018 could be Neymar's World Cup, however there are question marks over his temperament.
Despite a young and improved squad, Nigeria have been put in a very tough group
Croatia had to beat Greece in the playoffs to qualify, but did so easily with a 4-1 win in the first leg.