Costa Rica shocked Italy and Coach Jorge Luis Pinto wants them to “think big” against Greece to reach the quarter-final.
Their Round of 16 tie kicks off this evening in Recife at 21.00 UK time (20.00 GMT).
“We are still writing the history of football for our country,” said Pinto in a Press conference.
“For that reason, because we know how much the country is enjoying our World Cup, we want to do it right.
“We are not favourites. Greece are a strong team, aggressive as well as technical, who have some very good players.
“They won the European Championships in 2004 so they have a pedigree, and they have the quality to reach the next stage of the tournament, though of course we also believe that of ourselves.
“We know we have surprised the world, not just our country, and there is no limit to what we can achieve.
“We want to go as far as we can, but we must approach this game in exactly the same way as we approached the others.
“Few would have expected this match in the Round of 16, but here we are and one of the teams must win. There is no reason why that should not be Costa Rica.
“My message to the players and to everyone at home is to think big. Be realistic, but still think big. We have all the motivation we need, we have shown that already, but we would like to do something even better for our country.
“I don’t say we are favourites but I do say we can win, and write some more history.”
This is only the second time that Costa Rica have reached the last 16 of a World Cup, the other being Italia ’90.