Sauber's Nico Hülkenberg says the C32 chassis is in need of significant upgrades following the Bahrain Grand Prix, with the German unable to record a points finish at the end of what was an extremely challenging weekend for the Hinwil-based outfit. After finishing 12th and almost half a minute behind the final top ten spot last Sunday, the former Williams and Force India driver called for a quick response from his team. "It was a difficult and frustrating weekend," said Hülkenberg. "It was clear from the beginning that we were not fast enough and that it would be challenging. We are lacking speed and eat up the rear tyres too much so it simply wasn’t enough. "We...
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