Look at the straight line, you can see kick serve the ball felt down a bit further on the hair of the head, where flat serve is at the chin of the head. The purpose is to get more spin when brush the racket head from left to right.
I think more useful is looking at the rotation at contact. Much more rotated through the motion for the flat serve. Back foot shows the change in balance too.
Sometimes he hits more of a twist serve than kick. Both serves kick, but the twist kicks at a different trajectory than it came. Very deceptive if you haven’t returned one.
For one Federer is the worst to show this. His flat and topspin are almost identical. It’s like Sampras it’s very hard to tell what serve they are gonna use.
What makes his serve so great is the toss doesn’t give away the serve. he hits the flat and kick with the same basic toss
That is HARD TO DO
Look at the straight line, you can see kick serve the ball felt down a bit further on the hair of the head, where flat serve is at the chin of the head. The purpose is to get more spin when brush the racket head from left to right.
Perfección en su máxima expresión
The difference is so subtle
Super
I think more useful is looking at the rotation at contact. Much more rotated through the motion for the flat serve. Back foot shows the change in balance too.
flat more forward momentum yes
Thank you for that 👍
Wowz this is very usefull
What does left and right mean in 3 dimensional spacem
Brushing across the ball with the racquet face to produce spin rather than hitting the ball squarely for a flat serve
My lord
Is there any chance you could send me this video without the writing on it? I run a Federer fan page on Twitter and I’d love to post this 🥺
Djokovic probably had a team to just anticipate and read feds serve to break him
weird to pick federer for this showcase. the difference is famously hard to read. other players telegraph their serves a little bit more obviously.
Now show flat compared to slice
His kick serve diesn't seem to have any upswing.
Sometimes he hits more of a twist serve than kick. Both serves kick, but the twist kicks at a different trajectory than it came. Very deceptive if you haven’t returned one.
For one Federer is the worst to show this. His flat and topspin are almost identical. It’s like Sampras it’s very hard to tell what serve they are gonna use.
These are all wrong