Fraser-Pryce bids for sprinting immortality

Jamaican "Pocket Rocket" Shelly-Ann Fraser-Pryce is juggling being the fastest woman alive with motherhood as she bids for a third 100m Olympic gold－13 years after her first triumph.

The 34-year-old, who stands just 1.52 meters tall, is set for a mouthwatering clash in Tokyo with compatriot Elaine Thompson-Herah and Britain's 200m world champion Dina Asher-Smith.

US sprint star Sha'Carri Richardson was ruled out of the 100m in Japan after testing positive for marijuana at the US Olympic trials.