Cagliari have sacked coach Marco Giampaolo, the club have confirmed on their web site.
The Serie A strugglers are hovering above the relegation zone but are on the same points as bottom club Empoli after winning just two games this season.
Former coach Nedo Sonetti has been linked in Italian media with a return to the hotseat.
Siena also parted company with coach Andrea Mandorlini and brought in former manager Mario Beretta on Monday while fellow relegation candidates Livorno and Reggina have already changed coaches in what has been a tumultuous season thus far.
