Despite Switzerland’s good record at major tournaments for a country of their size, they come into this year’s World Cup in poor form.
The Swiss have lost five of their nine matches this calendar year, including a 2-0 defeat to Ghana in their final warm up game.
Murat Yakin’s side produced a Jekyll and Hyde Nations League performance this summer as they lost their first three games to Czech Republic, Portugal and before winning the next three.
They have netted just five times in their last six games and this opener could be a low-scoring affair.
Cameroon have been involved in a number of low-scoring matches themselves in recent months, eight of their last nine games have gone under 2.5 goals.
The Indomitable Lions were hosts of the Africa Cup of Nations recently but were beaten on penalties by Egypt in the semi-finals.
However the west African nation followed that up with a dramatic play-off victory over Algeria to reach this point.
The same cannot be said for the Taeguk Warriors, who have won just three games at their last four World Cups.
However the Asian side did breeze through qualifying, with the only blip on their copybook a 1-0 defeat to the United Arab Emirates when qualification was already secured.
Uruguay have reached at least the quarter-finals in two of their last three World Cups. The South Americans burst onto the scene when finishing fourth in South Africa in 2010 and were beaten by eventual winners France in the quarter-finals of Russia four years ago.
The squad has an interesting balance of youth and experience with many of their stars from 12 years ago such as Luis Suarez, Diego Godin and Fernando Muslera present.
The youth comes from the likes of Darwin Nunez, Ronaldo Araujo and Facundo Pellistri who have added an injection of pace and trickery to the experienced core of the squad.
They have won seven of their nine games under new coach Diego Alonso and should have too much for this South Korea squad. They are fancied at 8/11 to pick up the victory.
With South Korea unsure of the fitness levels of Son, who will be playing in a protective mask after fracturing a bone near his eye socket playing in the Champions League for Totttenham, they are worth taking on.
Many of their likely defence play domestically, with the exception of Napoli’s Min-Jae Kim who has impressed at Napoli this season.
His teammates may struggle to contain the pace and physicality of Nunez however, who has had a whirlwind start to life at Liverpool.