Panathinaikos Athlitikos Omilos

Panathinaikos won their first National Championship in the 1929-30 season.
Winning the E.P.S.A. (Athens Football Clubs' Association) put them into a play off round robin with Aris (Thessaloniki- winners of the Macedonia Football Clubs' Association) and Olympiakos (Piraeus Football Clubs' Association champions).

The round robin matches went as follows:

18.05.30	Olympiakos	5	0	Aris	Pireas
01.06.30	Panathinaikos	8	2	Olympiakos	Athens
06.06.30	Aris	1	4	Panathinaikos	Thessaloniki
15.06.30	Olympiakos	1	2	Panathinaikos	Thessaloniki
22.06.30	Panathinaikos	2	2	Aris	Athens
29.06.30	Aris	2	1	Olympiakos	Thessaloniki

The final table:

	P	W	D	L	F	A	pt
Panathinaikos	4	3	1	0	16	6	7
Aris	4	1	1	2	5	12	3
Olympiakos	4	1	0	3	9	12	2

Angelos Messaris

Angelos Messaris scored 8 goals in the 4 matches. The resounding 8-2 win over their rivals Olympiacos was the stuff of legend for The Greens. A chant originated at the time:

Οκτώ στον Ολυμπιακό και τέσσερα στον Άρη, γεια σου Άγγελε Μεσσάρη!

Eight against Olympiacos 
Four more against Aris 
Yra for Angelos Messaris!

Ethnikos Gymnastikos Syllogos

Before 1908 football at the Olympic Games was merely an exhibition, played, if at all, between
club sides. The decision of the IOC to retrospectively publish 'medal tables' based on the outcome of these matches is frankly absurd.
The attempts to include football at the 1906 Intercalated Games offered no real encouragement for the prospects of a meaningful international tournament developing. On their foundation in 1904 FIFA had stated  their intention to introduce an international tournament in 1906, but nothing came of it.
What the 1906 tournament did give us though is the first seeds of a Greek national team. 
The Thessaloniki selection was largely made up of ethnic Greeks, but the Athens selection, effectively Ethnikos Gymnastikos Syllogos, is the team from which the 2004 European Champions  trace their descent. 
Ethnikos Gymnastikos Syllogos were primarily a gymnastic squad, and they had participated in the 1896 Olympics. At the time Greek football had no independent governing body. Football, along with other sports, was administered by the Hellenic Gymnastic Federation. 
The only non- Ethnikos Gymnastikos Syllogos member of the Athens selection was Georgios Kalafatis of Panellinios Gymnastikos Syllogos.  Kalafatis later founded Panathinaikos and coached the Greek team in their first official international at the 1920 Olympics.
Sadly Ethnikos Gymnastikos Syllogos did not display the sort of sportsmanship that one associates with the Olympic ideal. 9-0 down to Denmark at half time in the final, they refused to take the field for the second half, and were promptly expelled from the tournament.