Imagine if former Barcelona coach Carles Rexach had never discovered the wunderkind Lionel Messi at the age of 13. The world, as we know it, would have missed out on the greatest football champion to walk the planet. Musical virtuoso Mozart was only five when he composed his first piece and six when he performed before European royalty. It was his father Leopold who recognised and nurtured the young musical genius, giving us a pioneer of the classical era.