Motor racing: Vettel leads wet Silverstone practice

SILVERSTONE, England (Reuters) - Formula One world champion Sebastian Vettel topped the time sheets in a wet final practice for the British Grand Prix on Saturday, as neither of the Mercedes drivers bothered to set a timed lap.

The Red Bull driver, who has not won a race since last season when he wrapped up his fourth successive title, lapped the Silverstone circuit in a comparatively slow time of 1min 52.522sec.

Australian team-mate Daniel Ricciardo, who has out-qualified Vettel in six of eight races so far, was second fastest.

Mercedes team-mates and title rivals Lewis Hamilton and Nico Rosberg did a few exploratory laps to test the slippery conditions while Ferrari's Fernando Alonso also spent most of his time watching.

"It's not perfect with these conditions but it does not make a lot of sense to run at the moment. You need to save tyres," said Mercedes motor sports head Toto Wolff.

The two Mercedes were still fastest in the first two sectors and remain the clear favourites for Sunday's race.

Last year's race winner Rosberg leads Hamilton, who was quickest in Friday practice with a best lap of 1:34.508, by 29 points with 11 races remaining.

Saturday's qualifying was also expected to be wet.

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