Just admit it ... Curious made it impossible to describe it with language.
Dominant or non-dominant foot with or without weight transfer.


btw ... I think load/unload describes non-weight transfer strokes, but not so much weight transfer.
If Nadal hits a semi open fh with his right foot off the ground, he is clearly loading and unloading off left leg, rotating around left hip.
If he hits a closed stance 2hbh ... imo he does not load (or do early rotation assist ... wait until landed on front leg for rotation) from right leg. A step from right leg is not loading from right leg ... merely a step. Depending on 2hbh, probably no loading on his left leg either, just rotation around his left hip. I guess he steps up sometimes with front left leg on high balls ... unloading?
The confusing one's to me are like the first Nadal videos above where you pointed out it looked like traditional open stance off back leg, but on front (right) by contact. Sometimes both feet on the ground. Some 2hbhs hit off front leg with long stride, sometimes almost in place, sometimes step back but still hit off front leg. Loading, unloading, which hip ???
I take
@mad dog1 's coaches advice of hit more "neutral stance FHs" as hit more "weight transfer" FHs ... regardless of exact feet location (like Nadal above hitting weight transfer FHs with his feet in semi open position).
This is how I simplify all of it for my game:
- I need to be able to hit both FH and 2hbh around dominant hip, and also non dom hip (two basic strokes involving different hip for both fh and 2hbh).
For example, started 2hbh with only closed weight transfer. Recently came back and added hitting open (semi open) around my left hip. Different animal ... load on left leg, power with left leg, rotate around left hip (same as open FH hit from right leg).
My thinking is if you can't hit both in play ... do isolation drills, if someone does medicine ball do both hips (stroke type) drills. To me, from there ... turn your body and feet lose to do what comes naturally. You might have the thought "hit weight transfer FH" as first choice ... but it all has to be automatic/dynamic during play. If you can hit both two basic stroke types, your body will figure out the hybrids (both feet on the ground,etc).
One other observation from my 2hbh conversion. The back leg, step, swing, land front leg, rotate around front hip timing is EVERYTHING on weight transfer strokes. Unless you get that down ... none of the rest (loops, grips, arm positions, etc) matters