Sixteen-year-old Sotiris Ninis scored his first goal for Panathinaikos in a 2-0 home win over Panionios in the Super League on Saturday.
Panathinaikos reached the Greek Cup quarter-finals after a 3-2 penalty shootout victory over Apollon Kalamaria on Wednesday.
Olympiakos Piraeus maintained their 100 percent start to the Greek Super League but they had to come from behind to beat OFI Crete 2-1 on Sunday.
Athens-based Ionikos missed the chance to take over at the top of the Super League when they lost 1-0 at Aris on Saturday.
Two second-half goals from Rivaldo gave Olympiakos Piraeus a convincing 3-0 win over second-placed AEK Athens on Sunday and help them close in on a ninth Greek title in 10 years.
The pressure on Panathinaikos coach Alberto Malesani to quit went up a notch when his side could only manage a 2-2 draw at home to Iraklis on Sunday.
A double strike from Yaya Toure helped Olympiakos Piraeus to a 3-1 win over Egaleo as they moved four points clear at the top of the first division on Saturday.
Leaders Olympiakos Piraeus saw their winning start to the season come to a shuddering halt on Sunday as they lost 2-1 at home to PAOK Salonika.
Each of the five Greek first division clubs in European action this week warmed up at the weekend with league victories.
Olympiakos Piraeus warmed up for their Champions League opener against Rosenborg next week with a 5-0 league win over Panionios on Saturday.
Spanish striker Dani has joined Greek champions Olympiakos Piraeus on a free transfer from Spanish club Espanyol.
Brazilian forward Giovanni is leaving Olympiakos Piraeus to return home to play for his former club Santos.
Lille defender Stathis Tavlaridis remains the only new face in Otto Rehhagel's Greece squad for the World Cup qualifiers against Turkey and Ukraine next month and the Confederation Cup.
Two Iraklis footballers were kept in hospital overnight after being attacked during Sunday's league game against Aris Salonika.
Panathinaikos extended their lead at the top of the Greek first division to four points when they beat Ergotelis 3-1 in Crete on Saturday.
Panathinaikos took a major step towards retaining the Greek title when they beat arch-rivals Olympiakos Piraeus 1-0 on Sunday.