McLaren had a dismal start to the final pre-season test when their car broke down after just four laps. Stoffel Vandoorne had a battery problem, making it the third day of five in winter testing so far on which McLaren have had reliability problems. Ferrari's Sebastian Vettel was fastest in the morning, ahead of Mercedes' Valtteri Bottas and Max Verstappen of Red Bull. The Honda-powered Toro Rosso was fourth fastest. McLaren split with Honda at the end of last season, frustrated by three seasons of poor performance and reliability. Follow the first day of the final pre-season test here But the start of the team's relationship with Renault has not gone well, with a succession of...
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