– Formula 1 heads back to Europe, and the Circuit de Barcelona-Catalunya, for the fifth round of 2015 season. GPUpdate.net poses five key questions for the upcoming weekend of Grand Prix action.Will Ferrari edge closer to Mercedes? Ferrari has emerged as one of the talking points this year after surging from 2014's also rans to Mercedes' primary contender in 2015 – even beating them in Malaysia. The test now will be whether they can sustain that challenge – or even close the gap further – as the sport returns to its European heartland. With Ferrari having made huge engine gains – as shown by Sauber's form – it's likely that the main weakness compared to Mercedes is now the...
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