It's true that some of these big teams have a great amount of talent and skills, that it is almost inconceivable that they will lose. But in futbol, there is another big factor that contribute to the outcome, which is the tactical formation (or strategy). In the end, futbol is a team sport and requires the effort of the entire team and not just the talent of a few.
For example:
Chile - Spain
I was not able to watch the entire game, so this article does a great job explaining: http://bleacherreport.com/articles/2101884-spain-vs-chile-sampaolis-high-press-high-intensity-gameplan-destroys-la-roja
Basically, Spain is all about short passes and circulating the ball slowly. But Chile did a great job pressuring the midfield, cutting the flow of the Spanish game, and when Chile attack they are fast against the slow Spanish defenders.
Costa Rica - Italy
No one could have foreseen that Costa Rica would have beat Italy. Traditionally, Italy has always relied on their defense, but nowadays this team tries to play with short passes (similar to Spain), guided by its game maker Andrea Pirlo. Costa Rica did a great job by putting pressure almost on the entire field and surrounding Pirlo to disconnect him from the Italian play making. Since there is a big dependency on Pirlo, Italy was not able to generate much opportunities for scoring.
Still, Pirlo managed to generate some really exquisite passes to Balotelli, who unfortunately did not had a good day and missed a couple of key chances. Eventually, Costa Rica found a way to score, and Italy was never able to overcome Costa Rican strategy for the rest of the game.
Iran - Argentina
On a piece of paper, Argentina has tons of talent on the offense, but Iran surprised many of us by being able to hold the score 0-0 for almost the entire game. Only the best player of the world, Lionel Messi, was able to defy the tactical formation from Iran to bring victory to the Albiceleste.
But what Iran did, deserves the applause of many, as it is a team with many limits (skills and experience). It's true that they put almost 8-9 people on the defensive box, but it is not easy to keep focused and organized throughout the entire game to maintain the lock. They really put much effort onto it, and even they were able to generate some counterattacks that could have resulted on a goal.
But yes, the point is that big teams with big players do not always guarantee a victory. A "weaker" team can achieve victory if they play smarter. So there is room for shrewd teams in futbol.
Luke 16 talks about one interesting parable about the "Shrewd Manager", and I was always confused at the passage because the manager was dishonest and somehow he was commended at the end. I am not planning to do an in-depth study of the parable, but more a concise take home message.
The manager was not commended because he was dishonest, but that he was shrewd (Luke 16:8). Basically, the manager was in trouble because he was wasting his master's possessions, so he decides to give a discount to those people who owe money to his master. I guess his intention is to come in good terms these debtors, so that in the case that he gets fired, he can find people to help him out.
The point is that, the manager (in his worldly ways) is thinking on smart ways to secure a better future for himself. So similarly, we as Christians should also be thinking on smart ways to be more effective on the Kingdom work. On a more practical level, this could mean be more creative in bringing the gospel in our conversations with coworkers and classmates. The value (I think) is to be constantly mindful and engaged in the Kingdom affairs and not be complacent about it. There is always more things we can do to show God's message of the gospel to others.