[Retracted] Monitoring of Physical Fitness and Tactical Ability Based on Data-Driven Technology

Table 1

Tennis game tactics and codes.

Rounds	Hit the ball	Score observation point and code	Ignore observation points and code	Totally code
Serve	Serve	The other party’s hair loss (A+)	This part of the company (A−)	A
	Third shot	The other party’s fourth shot error (B+)	The third shoot error (B−)	B
	Hold I	The sixth shot of the other party (C+)	The fifth shot of this party and later mistakes (C−)	C
Get up	Get up	The third shot of the other party (M+)	This party is getting lost (M−)	M
	Fourth shoot	The other party’s fifth shot error (N+)	The fourth shooting mistake (N−)	N
	Hold II	The seventh shot of the other party and after the mistake (O+)	The sixth shot of this party and after the future (O−)	O