After watching Rafa win his 12th French Open, I revisited Toni Nadal’s TEDx Talk on how he built a champion in Rafa through building his character. It is one of my all-time favorites and a must see for all parents and coaches. Toni rarely speaks of the technical work he did with Rafa but speaks often and openly about his building character as the key to Rafa’s success. As many of us in the tennis world know, throughout Rafa Nadal’s career, his uncle, mentor and former coach, Toni Nadal, has been…