Panionios is one of only two Greek league teams to maintain a perfect record after two rounds, defeating Apollon Smyrnis 2-0 Sunday.
Defending champion Olympiakos, which beat Lamia 1-0 Saturday, also has six points.
Wingback Ehsan Hajsafi opened the scoring for hosts Panionios in the 39th with a solo effort, splitting the defense and scoring from close range.
Lazaros Lambrou made it 2-0 in the 56th after a swift exchange of passes with Fiorin Durmishaj.
Also, Panathinaikos stumbled into its second 0-0 draw, this time against visiting Levadiakos. AEK Athens also played to a scoreless draw at Giannena, and PAOK beat Kerkyra 3-1. [AP]