The American is track and field’s youngest world champion but you won’t find the 17-year-old boasting about his achievements The American is track and field’s youngest world champion but you won’t find the 17-year-old boasting about his achievements W e are in living in the era of teenage super talents. On Saturday, Mirra Andreeva won the French Open at 19. Spain’s Lamine Yamal, at 18, is one of the favourites for the World Cup’s golden ball. Then there is Cooper Lutkenhaus, the 17-year-old