Terry, along with midfielder Frank Lampard, was omitted from the first leg in freezing Athens where Avram Grant's side carved out a goalless draw.
The defender insists the Blues have the squad to win something this season despite their Wembley defeat.
"You can't come to Chelsea and get away with being an average player," said Terry.
"That's the way the club has gone and hopefully we can maintain this, and keep attracting the world-class players that we have.
"Having that taste of defeat is not a nice feeling to have, and there are things out there we can win, like the Champions League that we still haven't won."