Sebastian Vettel sets the fastest winter testing lap on morning of final day... as Mercedes finally show pace with Valtteri Bottas landing their quickest time in pre-season
By Dan Ripley for MailOnline
Published: 12:19 GMT, 1 March 2019 | Updated: 12:35 GMT, 1 March 2019
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Ferrari laid down a marker in the final morning of pre-season testing, as
