Juventus midfielder Claudio Marchisio admits they're playing poorly.

Marchisio, however, insists they didn't deserve defeat at Cagliari on Sunday.

"I believe that we didn't deserve to lose, but it's also true that we are playing badly," Marchisio admitted.

"We worked a lot during the week and I mean a lot, trying out tactics and solutions that we managed to pull off; in the week, yes, on the pitch, no.

"We have to find serenity."