Williams says it has not been able to verify Robert Kubica's assertion that his FW42 chassis performs differently from the car supplied to team mate George Russell. Since the start of the season, Kubica has been outpaced by Russell in almost every session and on race day, the Pole claiming his performance has been undermined by an aerodynamic divergence between his FW42 and Russell's mount. "It's clear that we are driving two different cars with the same set-up, so that is something we need to understand," Kubica said earlier this season. Russell: Williams set for moment of truth at Spanish GP Williams investigated the issue but could not confirm its driver's impression. "I...
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