Pros' Grips

[Pioneer]

I've been watching tons of court-level coverage lately and what I've noticed is that:

The pros grip their racquets higher than recreational players are taught. Just look at pics of Roddick, Dimitrov, Wawrinka, Murray, Davydenko, Ferrer, Robredo! The buttcap is CLEARLY visible under their wrists.

What are the advantages of doing that and do you think coaches should study it and teach us what WORKS for the PROS?

[sureshs]

I have pointed this out in the tips section.

It is advised that the palm stay loose on the grip while serving, with even the pinky outside the butt. But pros seem to be gripping the racquet tighter on the serve with their palm fully on the handle, and treating the racquet like a hammer (without a smooth motion).

[Pioneer]

Probably it allows for more racquet head speed