Diego Lopez has returned to Cagliari as their coach, the Serie A side have announced.
Cagliari parted company with Massimo Rastelli on Tuesday after a recent poor run of form.
Lopez, who managed the club in 2013-14, returns after a spell in charge of Palermo.
A Cagliari statement read: "Cagliari Calcio announces that it has entrusted the technical guidance of the first team to Diego Lopez. Lopez has signed a contract that will tie him to the Rossoblu until June 2019. His staff will be officially announced in the next few hours.''
Cagliari got off to a mixed start in Serie A this season but Sunday's 3-2 home defeat to fellow strugglers Genoa saw them slip to 14th in the standings -- just one point above the relegation zone -- following a four-match losing streak.
Rastelli oversaw promotion from Serie B two seasons ago and Cagliari finished 11th last term.
The Sardinian side are next in action on Sunday when they travel to Lazio.