Almost universally, coaches and parents report to me their advice to players regarding competing effectively includes the aim to control unintentional match related thoughts and feelings like nerves, frustration, and helplessness. For example, statements like: "Believe in yourself", "Stay calm", "Don't worry about the outcome", "Accept errors", Don't get frustrated at the wind", etc, etc.
While this is well-intentioned and sensible on the surface, a crucial question to reflect on in trying to help players improve is this:
How well does it work?
For example, I imagine that before their matches against Nadal and Kerber, Alex De Minaur and Kim Birrell's coaches advise included a combination of certain strategies to employ and also the message: "Believe In Yourself".
But as their respective matches unfolded, I wonder whether their dominant thoughts and feelings were more reflective of self-belief or helplessness.
I strongly suspect that no matter what their coaches did or...