Greek is not a single language, but it had various dialects and evolved significantly over time. What form of Greek did the Romans who spoke classical Latin study? Was it contemporary for the purpose of interacting with Greeks or historical for the purpose of reading old literature? Did the Romans focus on a specific dialect or form (Attic, Homeric, Koine)?
Probably different Romans studied somewhat different things and anyone who studied Greek new a mixture of different forms. What I'm looking for is a big picture of what kind of Greek the Romans studied.