The surprise factor has gone, Santos said, and the upset wins have likely come to an end.
"I liked them a lot in the first three matches. I believe they surprised us a lot," Santos said after his Greece team lost on penalties to the Costa Ricans in the second round.
"But I believe at this moment people already know Costa Rica. It won't be very likely ... For Costa Rica to be able to go much further."
"I think in a competition like this you start to get tired and once you start to get tired, the individual players on the big teams start to carry more weight," he said.
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Cue Robin van Persie, Arjen Robben and Wesley Sneijder to take control of the quarterfinal in Salvador on Saturday for the Netherlands. Basically, Santos doesn't give Joel Campbell, Bryan Ruiz and the Costa Rica squad any hope of upsetting the Dutch.
Well, it may as well be Costa Rica's first game of the World Cup again.
Costa Rica responded by beating Uruguay and Italy and, while resting a couple of key players, holding England to a draw to top the group.
On Sunday, coach Jorge Luis Pinto's team added a former European champion to its list of vanquished rivals with a pulsating penalty shootout win over Greece after playing and defending desperately with 10 men for nearly an hour at Recife's Arena Pernambuco.