Greece captain Giorgios Karagounis serves a one-game ban after picking up his second yellow card of the tournament against Russia.
He could be replaced by AEK Athens midfielder Grigoris Makos or PAOK's Giorgos Fotakis.
Germany right-back Jerome Boateng is available after missing the win against Denmark through suspension.
His replacement, midfielder Lars Bender, will hope to keep his place after scoring against the Danes.
"Be happy dear Greeks, the defeat on Friday is a gift. Against Jogi Loew, no rescue fund will help you."
Headline from German newspaper Bild.
Sport and politics are often uneasy bedfellows, but it's impossible to ignore talk of bailouts and Eurozone exits in the build-up to Friday's quarter-final, which will be attended by Angela Merkel.
The German Chancellor is deeply unpopular in debt-ridden Greece because of the tough austerity measures she has demanded in return for financial aid.
Frau Merkel is considered a lucky charm by the German team - she saw their 4-0 demolition of Argentina at the 2010 World Cup but could not attend the semi-final exit to Spain.
The omens suggest Merkel is unlikely to be disappointed; Germany have never lost a European Championship quarter-final, and are on a high after winning all three group games for the first time at the tournament.
Now under the stewardship of Portuguese coach Fernando Santos, the team retains the battling qualities instilled by his German predecessor Otto Rehhagel.