Rosberg wins, Hamilton 2nd, Vettel 3rd, Bottas 4th
Hamilton recovers after being passed by Vettel at start
Grosjean hits pit crew during stop
Alonso, Maldonado out
Image source, Getty ImagesBarring any problems, Jenson Button will make a 100th Grand Prix start for McLaren this afternoon, becoming only the fifth driver in the team's history to do so behind Alain Prost (107), Lewis Hamilton (110), Mika Hakkinen (131) and David Coulthard (150).
Image source, Getty ImagesAlain Prost in action for McLaren in 1988
Image source, Getty ImagesMcLaren are the focus of The Sun's preview, external for this race, describing how Jenson Button had his best qualifying of the season thanks to McLaren's new high-tech paint job.
Image source, Getty ImagesWhile this grand prix has been won from pole in eight of the 10 previous race, on the eight occasions Nico Rosberg started on pole with Lewis Hamilton right behind, the German managed to stay in front of his team-mate just twice - at Monaco and Brazil.
David Coulthard
BBC F1 co-commentator
"Lewis Hamilton has always been a heart on his sleeve kind of guy. He does not hide his disappointment very well. One thing I thought was telling on Saturday is he said 'you can't win them all'. He acknowledges when you have someone like Nico Rosberg, who is a quick driver, he will get poles and will get races wins."
Image source, Sunday TimesThe Sunday Times steers clear of Lewis Hamilton's contract wrangle to focus on matters on the track, where it says team-mate Nico Rosberg is set to begin applying pressure to the world champion.
Image source, Mail on SundayThe Mail on Sunday focuses on Lewis Hamilton's ongoing contract talks with Mercedes and speculates that the team is digging in its heels over his demands for £145m over three years.
Image source, Getty ImagesGerhard Berger relaxes in the Ferrari garage at the 1995 Spanish Grand Prix. He would finish third at the race, his best result at the Circuit de Catalunya.
Samuel Douglas: Hamilton to win, Vettel second, Rosberg third and the Toro Rosso's impressing.
Niyaj: Hamilton to jump Rosberg at the start, then a fight between him and Rosberg to the finish, resulting in a Hamilton win.
Jenks: I predict everything Renault powered to blow up.
Andrew Benson
Chief F1 writer in Barcelona
"Like most teams, Williams brought an upgrade to the Spanish Grand Prix, aimed at improving 'driveability and headline downforce', according to head of performance Rob Smedley, and it has worked.
"Valtteri Bottas qualified fourth, just 0.2secs behind Sebastian Vettel's Ferrari. Beating him, though, will not be easy. Williams have had to realign their expectations this season after finding Ferrari were a long way ahead of them, and Bottas's performance was not quite enough for Smedley to reappraise where Williams are just yet.
"We have put ourselves in a favourable position with Ferrari,' he said. 'They are ahead of us in the championship and ahead in terms of pace but they are not insurmountable.'"
Image source, WilliamsA little pre-race engagement party for Valtteri Bottas, who lines up fourth on the grid for today's race. This is the first grand prix his fiance Emilia has joined him at since he popped the question. No pressure to perform then Valtteri...
Image source, Getty ImagesNico Rosberg, Lewis Hamilton and Sebastian Vettel were the only drivers to get through Q1 on hard tyres, enabling them to save a set of fresh mediums for the race.
No such joy for Vettel's Ferrari team-mate Kimi Raikkonen, however, who had a bit a shocker on Saturday.
The Finn completed just one run in Q3 on fresh tyres rather than the usual two, and stated later that he had lost a set of tyres because, of all things, a burning blanket.
He said: "We had one set of new tyres we would probably have used in the last qualifying but for some freak reason it got burnt in the blankets and destroyed. It is one of those things."
Image source, Getty ImagesIt might be a tough ask for him to secure this in Spain with the two Mercedes ahead of him, but Sebastian Vettel's next race victory will tie Ayrton Senna's career total of 41.
Andrew Benson
Chief F1 writer in Barcelona
"Can Ferrari challenge Mercedes this afternoon? It doesn't look like it on the evidence so far. The Italian cars retain their ability to make their tyres last longer than on the Mercedes, but on pure pace they have been miles off around the Circuit De Barcelona-Catalunya this weekend.
"Hard or medium tyres, low fuel or high, there has been a consistent margin of at least 0.8secs a lap between the Mercedes and Ferrari."
Image source, Getty ImagesOut of the current field of drivers, Kimi Raikkonen and Fernando Alonso are the only multiple winners of the Spanish Grand Prix, having won on the circuit twice before.
Michael Schumacher holds the record for the most wins with six. His first was in 1995 and his last in 2004.
Image source, Getty ImagesMichael Schumacher leads the pack into the first corner at the 1995 Spanish GP
Image source, Getty ImagesThe 1996 Spanish Grand Prix was the scene of Michael Schumacher's first win for Ferrari. It is also a victory that is generally viewed as his finest.
It torrential conditions, Schumacher recovered from a poor start, when he dropped to seventh, to superbly navigate his way through the field and into a dominant lead, ultimately winning by 45 seconds.
Image source, Getty ImagesThis will be the 25th grand prix held at the Circuit de Catalunya, and as we have over an hour until lights out I've trawled the archives for pictures of past races on the circuit to keep us entertained during the build up...
Image source, MercedesAs Andrew mentions, Nico Rosberg played down his first pole of the season, describing it as "a good day of the office".
I'm not sure thundering around a circuit in the baking Barcelona sun constitutes "a day at the office". It seems Mercedes' technical executive director Paddy Lowe agrees...
Andrew Benson
Chief F1 writer in Barcelona
"Mercedes F1 boss Toto Wolff was quick to play down the ramifications of Nico Rosberg beating Lewis Hamilton in qualifying. 'I know we like top talk them up and down,' Wolff said. 'Of course Lewis had quite a run, winning four races, but Nico was still in good spirits. Today he managed to extract a good lap and Lewis got in a bit of messy set-up situation or unlucky on the track with the conditions and here we go but I wouldn't interpret too much into whether somebody bounced back now or whether the dynamics changed. It's just another race.'
"Rosberg and Hamilton were singing from the same hymn sheet, with Rosberg dismissing a question about the psychological importance of his achievement by saying: 'It's just important for the race'. Let's not kid ourselves, though. Everyone knows it was important for Rosberg to lay down a marker if the championship was not going to start slipping away."
Here is how the drivers will line up today:
1) Nico Rosberg 2) Lewis Hamilton 3) Sebastian Vettel 4) Valtteri Bottas 5) Carlos Sainz 6) Max Verstappen 7) Kimi Raikkonen 9) Felipe Massa 10) Daniel Ricciardo
11) Romain Grosjean 12) Pastor Maldonado 13) Fernando Alonso 14) Jenson Button 15) Felipe Nasr 16) Marcus Ericsson 17) Nico Hulkenberg 18) Sergio Perez 19) Will Stevens 20) Roberto Merhi
Image source, Getty ImagesNico Rosberg, who has won just one race in the past 11 months, took pole in Spain in 2013 and was on the front row last year, but his only top five finish on this track was his second-place finish in 2014.