Nico Rosberg topped both practice sessions as the weather hampered plans at the Brazilian Grand Prix on Friday.
The Mercedes driver was in the right place at the right time to set those fastest times the quicker of which came in the morning on a drier circuit at Interlagos.
In that opening session Mercedes had a one-two finish as Lewis Hamilton recovered from a spin on his first lap to take second with the ever present Sebastian Vettel lurking in third.
Formula One's tyre supplier Pirelli were hoping to gain some running on their 2014 specification tyres to gain data however with the rain those hopes were dashed as they remained firmly in the back of the garages.
One key mention from the opening session has to go to Daniil Kvyat, the Russian teen was only behind the wheel of an F1 car for the third time in his racing career and on a new track in wet conditions he produced a brilliant performance to finish 8th in the session only 1.2 seconds slower than Rosberg's fastest time.
In the afternoon the weather had worsened and it appeared we were set for a session with very little action.
However after Kovalainen and then Webber had set lap-times on the very wet track early in the session, all the drivers emerged on to the circuit as the rain eased and teams looked to gain some further data.
With running on the full wet tyres kept to a minimum the intermediates returned even though the track was not completely ready, but with the cars running around a drier line did emerge and lap times finally began to improve.
Vettel set three straight fastest laps in his RB9 and Mark Webber was also very quick in the second Red Bull but Rosberg produced an excellent lap in the tricky conditions to lead in his Mercedes with a 1:27.306, a quarter of a second clear of Vettel with Webber third.
Lewis Hamilton was fifth in the second Mercedes with both Toro Rosso's in the top ten, Jean-Eric Vergne claimed sixth with Daniel Ricciardo ninth.
No such luck for Fernando Alonso who was 11th quickest with McLaren down at the back with Sergio Perez 18th and Jenson Button 22nd.
A difficult day which leaves a very distorted picture with no real order being formed, however with more rain forecast over the weekend, the pecking order may mean very little indeed.
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