Following his departure from Caterham, Rossi joined Marussia F1 as reserve driver for the remainder of the 2014 season. He was initially set to make his Formula One debut at the Belgian Grand Prix, replacing British driver Max Chilton, although Marussia later reversed that decision. He later was set to replace the injured Jules Bianchi at the Russian Grand Prix, but Marussia later decided to only run a single car for Chilton.