The Sicilians retained their unbeaten home record this season by fighting back from Diego Milito's penalty through Edinson Cavani.
"We had a bit of a timid start, as perhaps there was too much expectation after seeing how Inter played against Chelsea," said Rossi.
"Paradoxically we only settled after they took the lead. It has to be said, Inter are a wonderful team.
"In the end we were disappointed not to make more of our chances on the counter-attack, as perhaps we were a little too selfish. In any case, I must praise my players."
Rossi added: "I get positive vibes from this group of professionals. This team has a future and can achieve greatness, even if targets should be hit and not declared."