The Concacaf side have been the surprise package of the tournament so far and will fancy their chances of making it to the quarter-finals against Fernando Santos's men
The chances of it taking place in the 2014 finals were even more unlikely after Fifa drew the groups in December last year but the Central Americans, widely expected to be the weakest team of Group C, shocked the football world with wins over Uruguay and Italy.
Those results – along with a 0-0 draw against England – saw them not only reach the last 16 but do it in style, topping their pool.
|WORLD CUP SOCIAL HUB
|Keep up with all the latest news from Brazil and get involved in the debate on Twitter with our new World Cup Social Hub|
With their qualification guaranteed after their first two wins, Pinto has had more than a week to contemplate the pressure of knockout football ahead of Sunday's clash in Recife and although midfielder Yeltsin Tejeda has expressed surprise at facing Greece, who secured their berth in the round of 16 with a last-gasp 2-1 win over Ivory Coast, he insists that his side will be prepared.
"We were thinking more about [playing] Colombia and the Ivory Coast," Tejeda told reporters, "and in the end came the least expected team. Now we have to change the videotape."
Costa Rica have never gone beyond the last 16 at a World Cup, while Greece made history by progressing through the group stage for the first time.
Fernando Santos's side's last-16 hopes looked in tatters after a 3-0 defeat to Colombia in their first match in Brazil. A goalless draw against Japan did little to improve their chances but Greece then surprised the Ivory Coast in Fortaleza.
|World Cup Infographics|
|Uncover the statistics behind the World Cup with our new Unibet infographic series|
Samaras, who had not scored in over two years for his national side, showed nerves of steel to calmly slot the 93rd-minute penalty and coach Santos believes that the victory made a mockery of the claims that his team cannot attack.
"We showed against Ivory Coast how well we can defend but also how good we can be in attack," he declared. "We created a lot of chances and we kept attacking until the end. Even when we conceded the 74th-minute equaliser, we continued to attack."
Goalkeeper Orestis Karnezis and defender Panagiotis Kone were both substituted with injuries in the first half against the Ivory Coast. Karnezis is likely to be fit for this game but Kone's involvement is doubtful.
Greece captain Kostas Katsouranis is also available for selection after serving a suspension.