Toni: The only thing he does with his left arm is play tennis.
Good stuff. I didn't know that about Rosewall.Nadal is an example of cross-dominance. He does somethings with his left and others with his right. An example of what you're talking about is actually Ken Rosewall who was a natural lefty but forced to play with his right.
We all know that Rafa is not actually a lefty but instead has a dominant right hand, it was just that uncle Toni taught him to play with the left hand. However, reading about forcing people to change hands when writing, I came across info saying that it actually has a very low success rate for example to teach a righty to write with his left hand. So it's very impressive to me that with his non dominant hand he managed to get to the top of the sport, (although this is compensated by the fact that is more difficult to play against a lefty).
HOWEVER, let's stop for a moment and imagine, WHAT IF Nadal had continued playing with his right hand? Isn't his dominant hand more prepared to play tennis? Shouldn't that have ended in an EVEN BETTER forehand?
Wouldn't that overcompensate the advantage lefties have in tennis?