Shelly-Ann Fraser-Pryce is the fastest woman on the planet this year, so is American English Gardner.

Both women have sprinted 10.79 this season and will be looking to get one up on the other in Paris tomorrow to see who is 2015's real hotshot.

There is no doubting Fraser-Pryce's class, but Gardner represents a crop of youngsters eager to stake a claim on track and field's marquee event. Will the young American have her way in Paris, or will the 'Pocket Rocket' put her in her place?