Ferrari's car for the 2013 Formula One season is the Ferrari F138. Massa was replaced by Kimi Räikkönen for 2014, while Alonso was retained. Despite having such a line-up, the team struggled throughout the season, only achieving two podiums and finishing fourth in the Constructors' Championship behind a resurgent Williams, marking Ferrari's first winless season since . Stefano Domenicali was replaced as team principal by Marco Mattiacci. Prior to the 2014 Italian Grand Prix, Luca Cordero di Montezemolo announced his resignation as Ferrari chairman. Räikkönen was retained for the season while Alonso left the team, to rejoin McLaren. He was replaced by Sebastian Vettel, who left Red Bull Racing. In October 2014, the team announced replacing its outdated simulator software to the more capable rFpro.