Does anyone know how Rafa was so successful during his early years. He seemed to easily win and go deep in many challengers and qualified for atp tourneys early at 16. Rafa didn't have many weapons at that age(and some will say he still has none - was it really just all the mental toughness as they say? Yes, realize most were clay, but still most of the guys don't break through as early these days, like Sampras, agassi and Chang all did in their teens. Closest I can remember is i think Nishikori made R16(USO) and won a 250(delray) at 19 yrs old. But he hasn't gone anywhere lately aside from the Nole win last year. Seems like the game has really changed now. Roger also did very well going to R32 and R16 in the slams at around 19/20 but you don't see the young ones come up like they did back then, maybe Luke Saville can prove me wrong when he has a full schedule next year.