Button tops F1 first practice in China

McLaren's Jenson Button topped opening practice for the Chinese Formula One Grand Prix.Button, the reigning world champion, set his session-best time of 1min 36.677secs just after the half-way mark, 0.071secs quicker than Mercedes driver Nico Rosberg in second place. Button's teammate Lewis Hamilton was third, less than a tenth of a second adrift. Michael Schumacher (Mercedes) was fourth, while Sebastian Vettel (Red Bull Racing), race-winner in Malaysia two weeks ago, rounded out the top five.