Schengen Port of Entry

[azkaban]

Hi,

I am planning to travel to Greece and Italy this summer from US for 10 days. If I get my visa from the Greece embassy (which is just a walk in) is it allowed that i enter Italy first and then go to Greece or should i first land in Greece?

i read that the port of entry should be the country where i got the visa. so does that mean that i need to have a direct flight to greece? or can i have a connecting flight to Greece with a stop over in another european country?

Thanks