Nico Rosberg topped the times for Mercedes in Friday's second free practice session at Silverstone ahead of this weekend's British Grand Prix.
Toro Rosso's Australian driver Daniel Ricciardo drives through the rain during the first practice session for the of the British Formula One Grand Prix at the Silverstone circuit, central England on July 28, 2013. Ricciardo, tipped to be a contender for Webber's seat in 2014, was sixth in the leading Toro Rosso ahead of his team-mate Frenchman Jean-Eric Vergne, another Red Bull possible.
The German, who celebrated his 28th birthday on Thursday, clocked a best lap of one minute and 32.248 seconds in improving drying conditions after a rainswept morning.
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