Button 'surprised' at Perez pace

McLaren's Jenson Button says he is "surprised" at his team-mate Sergio Perez's performance during qualifying for the Spanish Grand Prix.

The 2009 world champion qualified 14th, the first time he failed to make it into Q3, while Perez will start ninth on the grid.

BBC F1 co-commentator David Coulthard also analyses Button's fastest lap round Catalunya, saying the McLaren is "not pretty at low speeds".

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