Custom pro shoes

We all know that a vast majority of pros do not use stock racquets. They could be custom, older racquets with a pj and/or so on. We know a lot about this, but not so much about pros' shoes. Yes, this could be because not that many pros use custom shoes, but shoes, like racquets is another interesting facet of the game that I'm interested in.

So far, I know that Federer and Nadal, both Nike users, have custom-made shoes. If anyone doesn't know about this see this post by...

Custom pro shoes