Amantle Montsho wins women 's 10m at world championships . Diminutive German runs fastest time of Monday . Build up to event dominated by positive doping tests . I came here and did my best and actually won . Gong Lijiao dips for 400 m gold .
Amantle Montsho wins women 's 10m at world championships . Diminutive German runs fastest time of Monday . Build up to event dominated by positive doping tests . Gong Lijiao dips for 400 m gold .