Practice One – Button on top after Buemi scare

McLaren’s Jenson Button edged out Mercedes’ Nico Rosberg in Friday’s opening practice for the Chinese Grand Prix, which saw more engine woes for Ferrari’s Fernando Alonso and a dramatic front-end failure on Sebastien Buemi’s Toro Rosso.

Buemi was unhurt after the STR5′s entire front suspension shattered, losing both its wheels and putting the Swiss driver into the barriers…