Juventus goalkeeper Gigi Buffon accepts they're still not firing on all cylinders.

Despite victory over Siena on Sunday, Buffon admits they're still to find their best form.

"When you are bit sick the only thing that can cure you is a long run of wins," said 'keeper.

"We returned from Siena with an important win but we need to improve as soon as possible. The next nine days will be fundamental for us both in Serie A and the Champions League.

"We need to stay focused and be determined. On Wednesday we will face Sampdoria, one of the most in form Italian sides on the peninsula and the team which plays the best football at the moment."