The 37-year-old midfielder, who also spent time at Inter Milan and Panathinaikos and was released by Fulham last summer, has retired from football.
Bryan Ruiz put in another impressive performance for Costa Rica against Greece - but Kostas Mitroglou did not fare so well.
Mahamadou Diarra's injury turns the spotlight even more sharply on Fulham boss Martin Jol's latest shrewd free agent acquisition, Giorgos Karagounis.
Fulham have been linked with Greek veteran Giorgos Karagounis on a free transfer. If they can pull the deal off it may not be a bad idea.