Red Bull racing driver Sebastian Vettel of Germany listens to a question during a press conference at the Shanghai International Circuit, April 14, 2011, ahead of the 2011 Formula One's Chinese Grand Prix. McLaren and Ferrari may look to Mark Webber to help clip his teammate Sebastian Vettel's wings in this weekend's Chinese Grand Prix - and end his runaway start to the 2011 world title race. [Photo/Xinhua]