How Delle Donne and Curry became the world's most dominant shooters

In an extract from a new book on how elite athletes are made, Tim Wigmore and Mark Williams unlock the secrets of the world's best players

When she has a free throw, Elena Delle Donne bounces the basketball three times. Then, she says a few words to herself and I let it fly". Nineteen times out of 20, Delle Donne scores.

Delle Donne is the most successful free-throw shooter in basketball history. She has landed 93.8% of her free throws in the rim - over 3% more than nearest rival, Steph Curry. She once made 59 consecutive free throws.