Toly, what is this hummer
grip you keep talking about? It sounds kinda dirty/risque.
To to the OP: the differences that you show between the 2 grips is subtle. Most others would have a more significant difference. For most conventional grips, the racket handle would lie diagonally across the palm. With the fingers bunched together, players have the racket handle much closer to perpendicular to the arm and fingers. I am reluctant to refer to this as a hammer grip because way too many sources outside of TT refer to a conventional continental grip (diagonal orientation) as a hammer
(or chopper) grip
. How about if we refer to the perpendicular orientation as a baseball bat grip
or something else?