Greece have appointed former Chelsea boss Claudio Ranieri as their new manager.
Greece captain Giorgos Karagounis has retired from international football following his country's World Cup elimination.
Costa Rica booked a quarter-final date with Holland as they held on with 10 men to see off Greece 5-3 on penalties.
Greece coach Fernando Santos admitted defeat to Costa Rica was hard to take as they secured a penalty shoot-out victory.
Georgios Samaras has dropped into the free agent pool but remains fully focused on international matters with Greece.
Georgios Samaras scored a stoppage-time penalty as Greece stunned Ivory Coast 2-1 in Fortaleza to reach the last 16.
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