Nico Rosberg looks on before practice. (Photo: Getty Images)

looks on before practice. (Photo: Getty Images)

Mercedes drivers Nico Rosberg and led the way in the first practice session for the Brazilian Grand Prix.

Rosberg set his fastest lap of 1:24.781 early in the damp 90-minute session and as conditions worsened, no driver was able to bump the German from the top spot. Hamilton finished the session 0.449 seconds off the pace in second.

Four-time World Champion ’s late surge bumped him into third, pushing and down into fourth and fifth, respectively. Vettel’s Red Bull teammate, , posted the sixth-quickest time.

The Red Bull pair spent much of the wet session gathering data via single-lap runs, but both managed to improved in the final 20 minutes despite treacherous conditions.

Sergio Perez was seventh ahead of Toro Rosso’s , who was standing in for Daniel Ricciardo for first practice. Kvyat managed to finish over half a second quicker than 2014 teammate Jean-Eric Vergne.

Heikki Kovalainen, serving as Kimi Raikkonen’s stand-in once more, finished the session in ninth, with Sauber’s Nico Hulkenberg in 10th.

The rain in FP1 meant that the teams were not able to do any serious testing on the 2014 dry-weather tire that Pirelli brought to .

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