Although the team had moved on from its point-less 2014 campaign it lagged behind on updates to its Ferrari engine and a lack of aerodynamic development meant the car made little progress over the 19 races .
Ericsson was reunited with former GP2 rival Felipe Nasr at Sauber .
Although the team had moved on from Ericsson 's point-less 2014 campaign Ericsson lagged behind on updates to its Ferrari engine and a lack of aerodynamic development meant the car made little progress over the 19 races .
Ericsson was reunited with former GP2 rival Felipe Nasr at Sauber .