Ferrari are set to bring an engine upgrade for the Russian Grand Prix which will see Kimi Raikkonen move onto his second power unit, whilst Sebastian Vettel - who has already suffered a failure in Bahrain - will take his third unit for the event. Whilst drivers have just five units to last them the season - a record-breaking 21 races - Vettel's move to a third unit isn't of much concern as the unit raced in China, his second, can still be used at other events without incurring a penalty. However whilst some outlets have touted the upgrade as a major step forward which could see the gap to Mercedes cut to nothing, Ferrari team principal Maurizio Arrivabene has downplayed its...
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