Athletics: Brit hero facing 'biggest challenge' since London British long jump hero Greg Rutherford says he's facing his "biggest challenge" since taking London Olympics gold when he goes up against his two predecessors at Shanghai's Diamond League meet. Meanwhile, Russian pole-vault queen Yelena Isinbayeva says she is keen to claim her third Olympic gold but may quit if she flops at this year's Moscow world championships. Images and soundbites.