Georgios Karagounis and Angelis Basinas scored to give Greece an improbable 2-1 win over host Portugal in the opening game of Euro 2004.
Karagounis put the Greeks ahead in the seventh minute to stun the home crowd in Porto.
Basinas scored the second goal with a penalty kick six minutes into the second half.
Cristiano Ronaldo, whose foul on Giourka Seitaridis led to the Greek penalty, scored in stoppage time for Portugal.
In the other Group A game, Spain defeated Russia 1-0 in Faro on sub Juan Carlos Valeron's goal in the 60th minute.