Part 4. Tactics against Various Rubberers (Service)
4.4. Services Aiming the Table Off
When you will take a long service, looking at the opponent's posture, by whether the opponent's racket-head faces toward "down" or "up", you can predict the spin direction which the opponent will be aiming.
The service you should provide is that you avoid the service which the opponent can return it on Drive, and serve the spin which the return jumps over the coat.
In this section, since the rotation in the same direction as that of the opponent's swing is overwrited and served, the spin, which is noted red dashed line in vector notation, is a invalid vector and need to be subtracted from the opponent's swing. For details, see Section 7.2 “Consideration of Spin Composition and Vector Notation”. If you have not read it yet, you need to read it first.
Further developing the idea and take a bird's-eye view of the whole service、
4.6. Bird's-eye View of the Whole Service (Shake hand)
4.7. Bird's-eye View of the Whole Service (Pen holder)
4.4.1. Service to the racket head lowered
This figure compares two spin directions that you serve to the opponent who will start to swing lowering the racket head. (for example, the opponent who uses a pen folder or a shakehand racket player rubbing with Drive.)
See the left figure.
This example is that you serve with Shoot Spin (L).
In the case of this spin, you will be smashed by ΘDrive(ΘT).
Opponent swing with the racket head lowered gives the ball a spin of ΘCurve⋅Drive(ΘRT).
Equation is the following.
Shoot + ΘCurve⋅Drive = ΘDrive → Smashed.
See right figure.
However, if you serve with Curve⋅Drive (RT) to the opponent,
and the opponent is going to start to swing lowering the racket head,
the ball becomes such a spin as Frisbee, You will be able to guide the ball off the table.
Equation is the following.
Curve⋅Drive + ΘCurve⋅Drive - Shoot = ΘCurve → Table off
In the case of the opponent who knows it become table off, the opponent choose a connection, so you will attack it with a Drive. 2.2. Return by Drive agaist Sidespin
4.4.2. Service to the racket head raised
This figure compares two spin directions that you serve to the opponent who will start to swing raising the racket head.
See the left figure.
This example is that you serve with Curve(R).
In the case of this spin, you will be smashed by ΘDrive(ΘT).
Opponent swing with the racket head rased gives the ball a spin of ΘShoot⋅Drive(ΘLT).
Equation is the following.
Curve + ΘShoot⋅Drive = ΘDrive → Smashed
See the right figure.
However, if you serve with Shoot (L) to the opponent ,
and the opponent is going to start to swing rasing the racket head,
the ball becomes such spin as a Frisbee, you will be able to lead the ball off the table.
Equation is the following.
Shoot + ΘShoot⋅Drive = ΘShoot → Table off
In the case of the opponent who knows that it becomes table off, the opponent choose a connection, so you will attack it with a Drive. 2.2. Return by Drive agaist Sidespin