It’s by far the toughest to predict with the competitors being quite evenly matched.
All the teams have game-breakers, with Poland’s Robert Lewandowski, Senegal’s Sadio Mane, Falcao of Colombia and Keisuke Honda of Japan headlining.
Here we take a closer look.
Group H consists of:
June 19 - Columbia v Japan (2pm), Poland v Senegal (5pm)
June 24 - Japan v Senegal (5pm)
June 28 - Japan v Poland (4pm), Senegal v Colombia (4pm)
World ranking: 8
Prediction: Round of 16
Best finish: Third (1974, 1982)
Coach: Adam Nawalka
Poland are a powerful side and should end up in pole position at the end of the group stage.
They missed out on qualification for the last World Cup in Brazil.
But since then, Poland have been to the Euro 2016 quarterfinals where they only lost to eventual winners Portugal on penalties.
They also showed in the tournament that they can hang with the big boys, holding world champions Germany to a goalless draw in the group stages.
The core of the squad has been together for some time now and work well together under coach Adam Nawalka, who took the reins after their failed bid to qualify for Brazil.
In goal, the boss seems to rotate his keepers with former Arsenal duo Lukasz Fabianski and Wojciech Szczesny sharing the gloves, but he has favoured Szczesny in more recent games.
In the backline, Kamil Glik marshals the defence from centreback, next to Maciej Rybus.
Borussia Dortmund rightback Lukasz Piszczek is great going forward, but Nawalka has moved him into three-man defence as the boss experimented with different systems.
Normally the Poles set up to play on the counter, but with their ambitions high for the World Cup, they will be looking to be more unpredictable.
During their qualifying campaign, captain Robert Lewandowski scored 16 goals.
But with Kamil Grosicki being their next best with three strikes, you could say that they are too reliant on the Bayern Munich ace.
With a three-man defence, Poland still play with two holding midfielders, with wingbacks on the flanks to get the ball forward.
Karol Linetty of Sampdoria is a talented deep-lying playmaker and will look to release the players out wide, where Jakub Blaszczykowski runs hard, or feed the frontline.
Up front, the lethal Lewa is supported by Napoli forward Arkadiusz Milik and his teammate Piotr Zielinski. The Serie A duo have a great understanding.
Zielinski is the rising star of the side and has been compared to Belgium assist king Kevin de Bruyne.
With Zielinski able to bring other players into attacking moves, Lewa and Milik can find space in the box for crosses coming in from wide or make runs onto Zielinski’s passes.
Goalkeepers: Wojciech Szczesny, Bartosz Bialkowski, Lukasz Fabianski.
Defenders: Michal Pazdan, Artur Jedrzejczyk, Thiago Cionek, Jan Bednarek, Maciej Rybus, Kamil Glik, Bartosz Bereszynski, Lukasz Piszczek.
Midfielder: Jacek Goralski, Karol Linetty, Grzegorz Krychowiak, Kamil Grosicki, Jakub Blaszczykowski, Slawomir Peszko, Piotr Zielinski, Rafal Kurzawa.
Strikers: Arkadiusz Milik, Robert Lewandowski, Lukasz Teodorczyk, Dawid Kownacki
World ranking: 27
Prediction: Round of 16
Best finish: Quarterfinals (2002)
Coach: Aliou Cisse
It would be great to see more African sides shine at the World Cup, so I’m backing Senegal to go through from this group.
They have great pace going forward and are defensively strong in the central areas.
Up front, the Lions of Teranga can cause lots of problems, with Sadio Mane being the undoubted star of the show, able to play down the right or centrally in attack.
With the Liverpool man flying down the right, coach Aliou Cisse can count on Monaco ace Keita Balde to cause havoc on the left.
Ismaila Sarr, 20-year-old Rennes winger, has three goals for the national team and is ready to become a star at the World Cup.
Moussa Sow is first-choice to lead the line, but they have options in Premier League-seasoned strikers Mame Biram Diouf and Diafra Sakho.
In midfield, they have more Prem experience in anchors Idrissa Gueyea and captain Cheikhou Kouyate.
Cheikh N’Doye and Alfred N’Diaye are the other options to keep things solid ahead of a defence built on Napoli rock Kalidou Koulibaly.
Cisse’s team like to hit teams on the counter and without a really clever midfield playmaker, they rely heavily on the pace and power of their front four.
Goalkeepers: Abdoulaye Diallo, Khadim N’Diaye, Alfred Gomis.
Defenders: Saliou Ciss, Kalidou Koulibaly, Kara Mbodji, Salif Sane, Youssouf Sabaly, Lamine Gassama, Moussa Wague.
Midfielders: Idrissa Gueye, Cheikhou Kouyate, Cheikh N’Doye, Alfred N’Diaye, Badou Ndiaye.
Strikers: Moussa Sow, Mame Biram Diouf, Sadio Mane, Moussa Konate, Diafra Sakho, Ismaïla Sarr, M’Baye Niang, Keita Baldé
World ranking: 61
Prediction: Group stage
Best finish: Round of 16
Coach: Akira Nishino
Japan have a side capable of beating any team in this group on their day.
But they could find things difficult at the back against Senegal’s Mane, Poland’s Lewandowski and Colombia’s Falcao with the team leaking goals recently – conceding twice in each of their last four games.
It will be a worry for coach Akira Nishino, whose side can take positives from the fact that they won their last game 4-2, which turns out to be their only win of 2018.
The Blue Samurai will look to fix that with captain Makoto Hasebe at the back or defensive midfield, with Southampton’s Maya Yoshida and Galatasaray’s Yuto Nagamoto in the backline.
They have much more going forward with talents of Keisuke Honda and Shinji Kagawa to create.
But while the side are good on the ball, they are too indisciplined to keep possession and expose the defence way too often.
As such, you hardly see Honda and Kagawa on the pitch at the same time, which would probably work out great for star striker Shinji Okazaki.
World ranking: 16
Prediction: Group stage
Best finish: Quarterfinals (2014)
Coach: Jose Pekerman
Colombia have some really polished players in their squad.
At the back, Davinson Sanchez proved himself a classy centreback at Tottenham and with Cristian Zapata next to him ahead of goalkeeper David Ospina, coach Jose Pekerman has a strong base.
With star man James Rodriguez back to his best with Bayern Munich this season, the boss can use different systems to get the best out the last World Cup’s top scorer.
If he chooses to set his team up with more bodies in midfield, James has the range of passing to find wide men like Juve’s Juan Cuadrado and Luis Muriel of Sevilla from a deeper role.
Otherwise, he can let James roam in the hole and be more of a goalscoring threat. Up front, James can link up with “El Tigre” Radamel Falcao or Carlos Bacca.
Goalkeepers: David Ospina, Camilo Vargas, Jose Fernando Cuadrado.
Defenders: Cristian Zapata, Oscar Murillo, Santiago Arias, Yerry Mina, Johan Mojic, Farid Díaz, Davinson Sanchez.
Midfielders: Wílmar Barrios, Carlos Sanchez, Abel Aguilar, James Rodríguez, Juan Cuadrado, Mateus Uribe, Jefferson Lerma, Juan Fernando Quintero.
Strikers: Carlos Bacca, Radamel Falcao, Luis Muriel, Miguel Borja, Jose Izquierdo.