Ash Barty is completely unfazed by the multitude of offers, opinions and disappointment expressed after her shock announcement to retire from tennis at the top of her game at just 25 years old.

That’s the definitive verdict from Barty’s “mindset” and “life” coach, Ben Crowe, who she has credited with helping her become the world No. 1. It’s the separation of person from persona – an approach adopted by Barty that is also sweeping the business world.