Ivanisevich's Model

         by Andrey Kozenko, Ukraine, 2001

                        (Summary)

Would you like to gain more than 50% of points on your serves only, not taking care of quality of the play?

What requirements must be herewith to efficiency of first and second service?

I received so named "tennis functional" (complex function) Pm = F (Po, t), where:

Pm is a probability to win a match;

Po is a probability to win a point at self-serve;

t = (1- Poc/Po) – it’s a coefficient of advantage (0<t <1); t=0 - no advantage, t=1 - 100% advantage.

Poc is a probability to win a point for opponent at opponent's serve, Po >  Poc .

Analysis of the tennis functional show:

The more efficient of first and second serves, the less coefficient of advantage is needed to win a match;

The more play disbalance D, the less coefficient advantage is needed to win a match, D = Po -(1- Poc); 0<D<1. D=0 - no disbalance, D=1 -100% disbalance (everybody win self serves and nobody can't win opponent's serves).

Look at the Table (t versus Po & Pm),   received during solving the tennis functional.

Ро \  Рm

0,6

0,7

0,8

0,9

0,6

2%

4%

6,34%

9,45%

0,7

1,9%

4%

6,4%

10%

0.8

1,35%

2,86%

4,75%

7,55%

0,9

0,63%

1,33%

2,23%

3,62%

The Table shows that on increasing of efficient of serves (first and second), is required quite small coefficient of advantage on adversary to win the match, i.e. it’s possible to win a match on your serves only.

Statistic analysis of Goran Ivanisevich’s play at 2001 Wimbledon final match approve once more these calculations.

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