Hiddink reckons they deserved to see of Italian giants Juventus.
The first leg ended in a 1-0 win to Chelsea at Stamford Bridge while the second leg in Turin ended in a 2-2 draw.
“Sure we started in a bad way and we defended in a poor way for the first goal,” the Dutchman told Sky Italia.
“The goal scored in the first leg has been decisive. I think Chelsea deserved to go forward. Mathematics say a win and a draw is enough.
“The way we managed the game in the second half was good, so I think we deserved this result.
“We expected Juve to give us a hard game, because they needed to recover the result.
“I can’t compare things to what happened before my arrival, but I have tried to lift the spirit of this side and we are doing well.”
