Tsitsipas left shoulder on serve

2nd Serve Ace

Hall of Fame
Ok I think I've identified the move that is keeping Stefs serve suboptimal, and it has to do with this quick tuck of the left shoulder/arm that 1. Limits his range, 2. Limits his power, 3. Causes him to fall off to the left.

Given his height and athleticism, he absolutely should be trying to keep that left shoulder higher and using his whole torso to drive the serve.

His Dad seems like a decent, well meaning guy, but he clearly is not helping in certain critical areas, and I can only hope some better, professional eyes are brought in to get the serve up where it should be.
 

Lleytonstation

G.O.A.T.
Ok I think I've identified the move that is keeping Stefs serve suboptimal, and it has to do with this quick tuck of the left shoulder/arm that 1. Limits his range, 2. Limits his power, 3. Causes him to fall off to the left.

Given his height and athleticism, he absolutely should be trying to keep that left shoulder higher and using his whole torso to drive the serve.

His Dad seems like a decent, well meaning guy, but he clearly is not helping in certain critical areas, and I can only hope some better, professional eyes are brought in to get the serve up where it should be.
I am no technique specialist so I have two responses here...

One, I totally see that too and agree that it's his problem, and if he fixes it he will win multi Slams.

Second, I disagree, the vortex sub tonical extension in his shoulder needs to be moved three inches down and out about 3 degrees more. This will allow for his parabola distribution to be more symmetrical and linear. All of this will allow for a better serve. But instead, he tiktoks.
 

ZanderGoga

Semi-Pro
His upper body is fine. Excellent even. His off arm use is perfectly adequate.

If he's got a deficiency, it's in his footwork. Specifically, he's not getting the push you'd want off the back leg to drive the hip all the way through at the start of the swing. In consequence, his hips are often more closed than you'd like as he's contacting the ball, depriving him of both contact height and optimal power generation. When you don't generate that separation between the angle of the hips and the angle of the shoulder girdle before unwinding, the core doesn't get fully engaged. That's why you see that telltale forward lean at the torso. Once you know what to look for, it's easy to see a night and day difference between his service and the best servers with similar platform footwork. With Sampras, you'll see his hips practically pointing at the target before his core unwinds and his arm comes through. Stef's is still a very good stroke, but if he wanted to polish it, that'd be where to look. If he's got a coach competent to spot it and fix it. No idea what particular talents his coach has in that regard.

He might well know and not be worried about it. When everything else is that on-point, the difference between optimal and nearly-so isn't all that great.
 

2nd Serve Ace

Hall of Fame
His upper body is fine. Excellent even. His off arm use is perfectly adequate.

If he's got a deficiency, it's in his footwork. Specifically, he's not getting the push you'd want off the back leg to drive the hip all the way through at the start of the swing. In consequence, his hips are often more closed than you'd like as he's contacting the ball, depriving him of both contact height and optimal power generation. When you don't generate that separation between the angle of the hips and the angle of the shoulder girdle before unwinding, the core doesn't get fully engaged. That's why you see that telltale forward lean at the torso. Once you know what to look for, it's easy to see a night and day difference between his service and the best servers with similar platform footwork. With Sampras, you'll see his hips practically pointing at the target before his core unwinds and his arm comes through. Stef's is still a very good stroke, but if he wanted to polish it, that'd be where to look. If he's got a coach competent to spot it and fix it. No idea what particular talents his coach has in that regard.

He might well know and not be worried about it. When everything else is that on-point, the difference between optimal and nearly-so isn't all that great.
Your on to something here. I've noticed ST gets on his toes, comes back down some on the heel, and then relaunches into the ball. Basically a slight lower body hitch. Sampras has nothing like that.
 
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