Originally Posted by BevelDevil
Del Potro isn't the best model for who?
Fed/Nadal may be great models for people who have the time, frequent access to a ball machine, and who can put off the need to play well for many months (years?).
But for many people who are time/resource constrained, or who don't want to be out of competitive action for long, Del Potro's forehand is the most accessible straight-arm forehand.
It may actually be easier to learn than the standard, double-bend modern forehand.
And, as I said before, it offers the option of transitioning to a pronated takeback.
Bevel, why would Del Potro be a good model? I actually think too many club players construct there backswing in a similar fashion to him.