Ferrari have changed the chassis of Carlos Sainz's Ferrari ahead of Saturday's final practice session and qualifying at the Spanish Grand Prix.
The Scuderia fitted the Spaniard's car with a new survival cell overnight, and the team have since confirmed that this was due to a fuel system issue.
A Technical Delegate's Report released by the FIA confirms the change, as well as stating that McLaren have made the same alteration on Lando Norris' MCL36.
During Friday's opening practice sessions, Sainz finished FP1 in second behind teammate Charles Leclerc.
However, he seemed to struggle a little more in FP2, and ended the hour in fourth, with the Mercedes duo of George Russell and Lewis Hamilton sandwiched between the two Ferraris.
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