if any of the big hitters (berdych included) is really on, though, there's absolutely nothing ferrer can do.
the good news for ferrer is that outside of the current "real" top 3, most of the big hitters aren't able to play great ball consistently deep in tournaments, so ferrer capitalizes.
this is what ferrer does. grinds until his bigger hitting opponents get frustrated and eventually tire due going after all of the balls that ferrer retrieves.
it's why he's in the top 4 and makes the 2nd week of majors so consistently.