Greek media report on the lifting of restrictions on arrivals in Greece from abroad, but do not refer to any official source.

According to them, Greece plans to gradually lift restrictions on arrivals from abroad and open 9 airports for flights from the European Union and 5 other non-member countries, from Friday, April 16, while some media report that it will be applied from Tuesday.
The official goal remains that the full opening of tourism will be from May 14, 2021.
In the first phase, Greece will reportedly open up for flights from EU countries as well as the United States, the United Kingdom, the United Arab Emirates, Serbia and Israel. By the way, Greece opened its gate for vaccinated Israeli travelers on March 25, and there is no mandatory quarantine for them.

The first airports that will enable international flights are the airports in Athens, Thessaloniki and other popular destinations, while all other international airports in the country will open on May 14.
Tourists visiting Greece will abide by all restrictions currently in force in the country. The seven-day quarantine for international arrivals will be lifted on April 16.
The conditions for entering Greece are already known:

1. Vaccination certificate
2. Negative PCR test up to 72 hours before travel
3. Mandatory completion of the PLF form no later than 24 hours before travel

The only official statement on this topic was given by the Minister of Tourism, Harris Teocharis, at the end of March, when he only hinted at the unofficial opening of tourism in the middle of April.