Originally Posted by Doubles
Because Federer and Zeballos are so similar...?
No, Federer is much better than Zeballos. So if even Zeballos could beat Nadal on red clay, then a left-handed Federer would double-bagel Nadal on all surfaces.
As it is, even a right-handed Federer has beaten Nadal on all surfaces. So a left-handed Federer would be invincible against Nadal.