Panathinaikos game on despite riots
"The game will go ahead as planned unless something extreme happens in the afternoon. Then we will look again. At the moment we are working for the game," the official told Reuters.
The funeral of 15-year-old Alexandros Grigoropoulos, whose shooting by police on Saturday sparked the riots, is scheduled for 3pm (1pm GMT) on Tuesday.
Officials from both clubs met earlier on Tuesday with representatives of the police, fire and medical services as well as the European governing body UEFA.
"For the moment everything goes ahead, there is nothing to be concerned about," said UEFA's venue co-ordinator Christa Vollmer.
"We are in constant contact with Panathinaikos and we have reason to be believe there will be the necessary security."
The riots, which have spread to other cities in Greece, reached a climax on Monday with widespread rioting and looting around the city centre. A general strike has been called for Wednesday.
Panathinaikos need a draw to qualify for the last 16 of the Champions League while the Cypriot side must win to go through with Inter Milan who have already qualified from Group B.