Originally Posted by TennisCJC
Fed and Nadal also customize with lead as their static and swingweights are higher than stock models. But, they are using a customized retail racket. Nadal was using an older generation and not the latest model and there's a lot of speculation that Fed is still using an older model - both use latest paint job.
That original APD that Nadal uses is a pretty good racket. The GT and newer cortex versions play really differently. Even old rec players search for older frames long after they have been discontinued since they are so comfortable with them.