Are Greeks mixed with Slavs

Spartans wrote:

Today's Greeks are certainly not Slavs, but they cannot be compared predominantly with those of the Hellenistic Greeks of antiquity, and in the last point one has to agree with the historian Jakob Philipp Fallmerayer.

Even in ancient times, Greeks did not look like the Philhellenic imagined as the famous Johann Joachim Winckelmann. The founder of German-speaking archeology, who lived around 1750, met the longings of his contemporaries with his fiery idealization of Greek sculpture, which combines mind, body and sensuality. His ideal of Greece, which was enthusiastically received throughout Europe, was understood as an expression of naturalness and informality that could only exist in a country of freedom. Enthusiastic Philhellenes like Lord Byron were all the more disappointed when the Greeks did not live up to the ideal of beauty that they had expected - and that ancient statues pretended to be to them.

Even the ancient Greeks were colorfully mixed, because in prehistoric times they had laid down as conquerors over an old Mediterranean autochthonous population. After the classical era, Slavs, Albanians, Celts, Goths, Venetians, Turks and others crossed the country, so that today Greeks hardly differ from the rest of the population of the Balkans. Nevertheless, they managed to assimilate all foreign ethnic elements and establish their own language and culture. The other two large ethnic groups of the Balkans, Illyrians and Thracians, were unable to do this and were Slavicized. This is certainly also due to the cultural Greek dominance, which the Illyrians and Thracians - although Romanized - certainly did not have that degree.

Spartans wrote:

Slavic immigration has also left traces, possibly still present in place names, but immigration is being given too much importance than it really had. In contrast to the Bulgarians, the Slavic Elerment can hardly be recognized by today's Greeks, neither in language nor in appearance. The latter is not a scientific statement of mine, but a subjective one.

If the often assumed ratio of 50:50 between Greeks and Slavic immigrants is roughly correct, the Slavs have certainly left their mark on Greece. This is possibly reflected in the culture and some cultural customs, although I cannot say anything specific. There were also a number of Slavic place names in Greece, but they were Graecised in the 20th century. I cannot say whether at all or to what extent Greeks differ from southern Slavs in appearance. In view of the huge mill of peoples in the Balkans, any differences will certainly be minimal.