https://www.techradar.com/news/world-cup-2018-predictions-with-big-data-who-is-going-to-win-what-and-when

The Champions League final was not just an exciting game, but it was also a potential game changer: Liverpool Striker Mo Salah, Player of the Year, recipient of the Golden Boot and Egypt’s best known player had suddenly had his ticket to the World Cup cast into doubt after an aggressive challenge from Sergio Ramos left him injured.

The implications of this tackle could have been be huge: If Salah was unable to play for his country (it turns out that he has done the almost impossible and is fit), this could have affected Egypt’s chances in the World Cup, and while Egypt is unlikely to be troubling the later rounds of the competition, like a butterfly flapping its wings on the other side of the world, Egypt’s performance could in turn impact how the other teams in its group do - and ultimately affect which country gets to lift the trophy.