Panathinaikos put the massive disappointment of their midweek defeat in Europe behind them to maintain their perfrect start in the Greek Super League on Sunday.
They were made to work hard, however, by a tireless Xanthi side whose performance suggested they could be looking for a top-five finish this season.
Panathinaikos collected all three points though thanks to a rare headed goal from midfielder Costas Katsouranis, who popped up at the near post five minutes before half-time to turn in a corner on the left by Lazaros Christodoulopoulos.
Because of the fires last week causing two games in the capital to be postponed, Olympiakos, AEK Athens and PAOK were all playing their opening games and each of them walked away with three points.
Reigning champions Olympiakos scored twice in the first half through Leonardo in the 22nd minute and Enzo Maresca, who netted ten minutes later. That was enough to see them through a typically obdurate Larissa side.
AEK Athens secured a 1-0 victory at Atromitos, Ismael Blanco grabbing the only goal of the game, turning in Liverpool loan signing Krisztian Nemeth’s low cross after 58 minutes.
PAOK, whose opening match against Panionios was also postponed due to the fires, awoke from their slumbers after half-time to hit three goals in 11 second-half minutes and defeat Levadiakos 3-0 at the Toumba stadium.
Vieirinha set the ball rolling by scoring after 62 minutes, with Lucio Filomeno doubling the advantage three minutes later with a superb lob before summer signing Vassilis Koutsianikoulis sealed the victory with his first competitive goal for the club with 17 minutes left.
Also on Sunday, top flight newboys PAS Yiannina defeated Panthrakikos 2-0. Ilias Kotsios got the opener in the 34th minute with Christos Tzanis scoring his second goal in two weeks in the 66th.
On Saturday Aris and Iraklis played out a thrilling 2-2 draw at Kaftenzolgio Stadium, before a large and animated crowd.
The spectacle, however was marred by a one-man pitch invasion which saw the game delayed for upwards of 50 minutes.
The fan entered the playing arena in the first minute of the match and squared up to Aris custodian Michalis Sifakis in a bizarre incident.
Argentinean striker Javier Campora struck twice for Aris but each time Iraklis managed to find an answer.
After Campora put the visitors ahead in the 21st minute, Constantin Iacob restored parity just five minutes later.
Campora found the net again in the 38th minute but Iraklis managed a share of the points when Denis Epstein fired home from the penalty spot just before the hour.
Asteras Tripolis, meanwhile picked up their first away win of the season by beating Super League newcomers Kavala 1-0.
Ergotelis made up for their 3-0 opening day thrashing with a 1-1 draw at Panionios.