Valtteri Bottas fears Ferrari hold early advantage over Mercedes as winter tests draw to a close: 'We feel at this point they're a bit ahead' Neither Mercedes driver has managed to top the time charts in Barcelona Ferrari's Sebastian Vettel and Charles Leclerc have flown out of the blocks Lewis Hamilton and Co will return next week for final four days of testing Alexander Albon registered the quickest lap of winter testing with a 1:17.637
By Philip Duncan, Press Association
Published: 14:27 GMT, 21 February 2019 | Updated: 14:27 GMT, 21 February 2019
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Mercedes fear rivals Ferrari hold an early advantage as Formula One's opening winter test draws to a close.
World champion Lewis Hamilton posted his fastest time of the week on Thursday, as Mercedes finally turned on the speed in the concluding day of running.
But the 34-year-old British driver, nor his Mercedes team-mate Valtteri Bottas, have failed to trouble the top of the time charts at Barcelona's Circuit de Catalunya.
Ferrari have looked sharp in winter testing and Mercedes fear their rivals are in front
Valtteri Bottas admitted that in both long and short runs, Ferrari have been quicker