The Blues take a one-nil lead to the Stadio Delle Alpi as Juventus look to dump Chelsea out of the Champions League.
But Hiddink is bullish: "It's always nice to have a clean sheet," said the Dutch coach.
"That's very important. But if you just wait in the second leg and hope not to concede, willing not to concede a goal and not have any initiative in the game, you will have a lot of problems.
"So, whenever we can, the team must attack. It's in their character. We've not come here just to defend. That would be asking for trouble.
"When you are in this period in Europe, I don't want to talk about luck but you have to force luck a little bit."
Chelsea will be hoping that Nicolas Anelka returns after a two-game absence, while Michael Essien is looking to oust MIkel frorm a midfield spot.
One man who is in top form is Didier Drogba, the goalscoring machine has rediscovered his touch and is banging the goals away.
But Chelsea's away record in Europe is shocking with no wins this season.
Deco is also in the squad and could feature if the Blues are losing the match.
John Terry will take a penalty should the game go into the farce of a shoot-out.