Football is all about taking your chances and in the big games getting a bit of luck. The World Cup is the biggest stage for football and that comes with extremes amount of pressure. Many footballers have their own little superstitions, it can be saying a pray or what foot you step on to the pitch with first. Fans have also been known for their superstitions. They're some strange ones out there but Mexico seem to have found a working one.
Mexico believe that one of their club sides, Cruz Azul, is cursed. They've gone from being the equivalent of Manchester United to not winning a trophy in over 20 years. Mexican's believe that fans seen supporting or wearing a Cruz Azul jersey is destined for failure. This has prompted Mexico fans to give out Cruz Azul jerseys throughout the tournament, to give teams "bad luck".
What ever you believe this tactic seems to be working. A man was spotted in the Argentina crowd wearing a Cruz Azul jersey when they lost 3-0 to Croatia. Before Mexico played Germany, a German fans were "fooled" into wearing the jersey, and as we know Mexico came out 1-0 winners in that game and Germany finished bottom of the group. They did it again when they played South Korea as seen above. They won that game 2-1 and was a big part of them progressing to the round of sixteen.
Mexico also believe that their national team is cursed. In the last seven World Cups they've made it out of the group stages but then gone out in the round of sixteen everytime. Mexican fans will be looking for naive Brazil fans to pass on the Cruz Azul jersey and the bad luck that supposably comes with it.