FIFA World Cup 2018, is the biggest event in the earth, no doubt about it, and the big events bring in big opportunities not only to people involved in white collar business but it's the time when black Mafia is pretty active with their scams.
The betting fans are eager to put their money in their liked teams and players, so they are pretty much active in websites and social pages trying to alter the popular views and make people bet on losing team or players. So, when matches collide they will have lesser opportunity to snatch away fan's bet money.
It can't be termed as a fix, but against the fair play rule. If any team is sure to qualify after winning two back to back qualifiers, they might just not perform willingly against the third team if the third team is strongest and these two can meet up anywhere in the quarterfinals. As winners of one team will face the runner-up of the other, it can be easier for them to qualify up to the Quarterfinals.
A lot of our readers might not know the real reason behind the collision of these matches is West Germany's shameful match-fixing act with Austria. Before 1982 World Cup in Spain the games weren't played simultaneously, but that world cup changed everything.
Going into the match, the two sides were top in their group but after Algeria defeated Chile West Germany and Austria shook hands to hand Germany and an easy 1-0 victory was handed to Germany so that they both could qualify. For Germany, it was an easy win and for Austria, it was their ticket to the top 16's spot.
Horst Hrubesch scored in the 12th minute, putting West Germany ahead and then came the disaster match of them kicking the ball around like they do in practice sessions.
Despite being criticised, cursed and bullied by desperate fans nothing else happened as no Rules were broken, hence the 1996 Worldcup saw a collision of group matches in the end.