Valtteri Bottas says Mercedes still needs to “unlock more” from its updated aerodynamic package to compete with Ferrari at the start of the 2019 Formula 1 season.  The reigning world champions debuted a major aero upgrade at the start of the final week of pre-season testing in Barcelona in a push to find added performance ahead of the new season.  Both Lewis Hamilton and Bottas had stressed Ferrari looked the team to beat during the first test after it made a strong start, and Bottas believes the Italian squad remains the benchmark.  5774263478001 CrashTV:  “They still seem strong,” Bottas replied when asked how he viewed Ferrari after a full week of testing.  “It’s as...
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