Many say it dosen't matter where you finish but still different players finish at different positions. What determines where you should finish your forehand?
eg Djokovic finishes up high. Federer a bit lower. Wawrinka even lower.
I know it will depend on the stroke but in general out of 100 random forehands one would see Djokovic finishing higher than Federer and finishing higher than Wawrinka on average.
Also I find it interesting that for the topspin backhand everyone finishes up high regardless if its single or two handed.
yes and no simultaneously.
on one side it doesn't matter as the contact between the racket and the ball already happened in the past.
so, technically, if you would be able to make a funky finish as opposed to the natural swingpath, it wouldn't have any impact on the ball anymore.
where it does matter.
in particular with pros, that hit with crazy pace and spin.
try to see 2 of the Nadal's quite different forehand shots:
1. let's say the rally ball on clay, where he tries to induce this crazy arch and crazy RPM. is the finish called windshield?
that type of finish is probably the most natural continuation of the swingpath
2. try to see some of his run-around inside out forehands, when he goes for a 1 shot winner, and the speed of the ball can reach 150 km/h and even more (around 100 mph)
you can clearly see that the finishing happens much lower when compared to the previously described shot.
again, this type of lower finishing is probably more natural for shots where the player goes for less arch, more pace.
Let me guess that there is not much difference between the energy required to produce the 2 shots.
And let me guess that the RHS is quite similar.
The difference comes in how this energy is distributed between spin and pace.
The more up his hand goes, the more spin will be imparted and thus less speed.
While a lower finish means that he goes for brute force and less spin, yet spin is needed.