Rafael Nadal was 16 when the 2003 season started. Despite his young age, the Spaniard was a man on a mission in the season’s opening months. Rafa reached four Challenger finals by March and claimed the title in Barletta. It was his ninth Challenger event in a career, and Nadal would play only three more in the rest of 2003 before moving to the ATP Tour.After Barletta, Rafa qualified for his first Masters 1000 event in Monte Carlo and reached the third round after stunning world …