Practice 1 Report - Business as usual

It was business as usual for the opening day of practice in Spain as Mercedes drivers Nico Rosberg and Lewis Hamilton topped the times they were a second quicker than Ferrari teammates Sebastian Vettel and Kimi Raikkonen.

The line-up for the weekend was: Mercedes Lewis Hamilton and Nico Rosberg. Red Bull Renault Daniel Ricciardo and Daniil Kvyat. Williams Mercedes Felipe Massa and Valtteri Bottas. Ferrari Sebastian Vettel and Kimi Raikkonen. McLaren Honda Fernando Alonso and Jenson Button. Force India Mercedes Nico Hulkenberg and Sergio Perez. Toro Rosso Renault Max Verstappen and Carlos Sainz. Lotus Mercedes Romain Grosjean and Pastor Maldonado. Marussia Ferrari Will Stevens and Roberto Merhi. Sauber Marcus Ericsson and Felipe Nasr.

In FP1, however, Jolyon Palmer replaced Grosjean in the Lotus; Susie Wolff took over Bottas' Williams and Raffaele Marciello drove Ericsson's Sauber.

Maldonado was the first out of the pits and out onto the 2.892mile (4.655-km) 16turn Circuit Barcelona-Catalunya.

Pirelli provided its hard and medium compound dry weather tyres for this event, and in FP1 everybody ran the hard compound slicks with the orange sidewalls.

Rosberg set the first lap of the session a 1:31.069. Hamilton posted a time that was 0.166 of second slower.

15 minutes into the session, Stevens got onto the timing screens with a time of 1:37.732. He then lowered that to a 1:34.661.

20 minutes into the session, Hamilton set a 1:28.993. Then Rosberg beat that with a 1:28.384. And Vettel topped that with a 1:28.141.

24 minutes into the session, Ricciardo was stuck in the pits with engine problems as Hamilton topped the times with a 1:27.509.

27 minutes into the session, Rosberg was back on top with a time of 1:27.333.

30 minutes into the session, the top 10 were: Rosberg, Hamilton, Vettel, Raikkonen, Sainz, Verstappen, Nasr, Massa, Kvyat and Marciello.

It all went quiet as all the drivers were in the garages having their cars checked over before heading out again.

49 minutes into the session, the Marussia drivers, Hulkenberg and Alonso broke the silence. Alonso jumped up to eighth place while Hulkenberg claimed sixth.

With 31 minutes remaining in the session, Hamilton clocked a 1:26.898.

With 27 minutes remaining in the session, the top four were Hamilton, Rosberg, Vettel and Raikkonen.

With 25 minutes remaining in the session, Rosberg improved to a 1:26.828.

With 7minutes remaining in the session, Ricciardo finally got back out on the track. He quickly got up to speed and moved up to 11th place, and then to ninth.

The top 10 at the end of FP1 were: Rosberg, Hamilton, Vettel, Raikkonen, Sainz, Verstappen, Kvyat, Massa, Ricciardo and Nasr.