Costa Rica triumph over Greece after shoot-out agony
Costa Rica keeper Keylor Navas dived to superbly save Theofanis Gekas's fourth penalty for the Greeks, leaving Michael Umana to stroke home the decisive kick.
After a dire first half the game came to life in the 52nd minute when an unmarked Bryan Ruiz placed a low sidefooted shot beyond Greek keeper Orestis Karnezis and into the corner, but Costa Rica then had defender Oscar Duarte sent off for a second booking in the 66th minute.
Greece, who made it into the last 16 after an injury-time winner against Ivory Coast, again struck in added time when Gekas unleashed a shot that Navas parried straight into the path of Sokratis Papasthathopoulos who gleefully rammed into an empty net.
Greece almost snatched a 2-1 win moments later when Kostas Mitroglou had a header tipped over but though they had the best of extra time they were unable to press home their advantage and paid the price in their first shoot-out.