Mercedes driver Nico Rosberg won an entertaining Chinese Grand Prix in Shanghai.
Starting from pole position, Rosberg led team-mate Michael Schumacher away at the start and immediately began to build a small lead.
However, while Rosberg was never headed during the race except during the pitstop phases, his victory was made considerably more comfortable by two critical problems that befell his rivals.
First, the Mercedes team failed to secure one of Schumacher's tyres at his first pitstop, forcing him to pull out of the race and retire.
Then Jenson Button's McLaren team struggled to change a rear tyre during one of his pitstops, dropping him crucial seconds and dropping him back into a massive scrap for second place that featured Kimi Raikkonen (Lotus), Sebastien Vettel (Red Bull), Lewis Hamilton (McLaren) and Mark Webber (Red Bull).
That scrap cost all of the runners involved time, and although it was eventually decided in favour of Button after he decisively dived down the inside of Vettel, the Briton was left rueing his pitstop problem, feeling he could have challenged for the win without it.