Juventus goalkeeper Gigi Buffon says they're well prepared for the Champions League.

Juve open their campaign at defending champions Chelsea tonight.

"We have more awareness of our potential than we did in 2009," he said of Juve's last foray into the Champions League.

"Before we would rely on individual champions, but now we are more and more becoming an effective unit.

"Naturally, Chelsea's players have a lot more combined Champions League experience than we do right now, so we are to be considered underdogs.

"However, there are three or four sides who are the favourites to win the trophy and I would put Juventus in the group just behind them."