Joe's ATP Tour Statistics
Index Statistics of the year 1991 Statistics of the year 1992 Statistics of the year 1993 Statistics of the year 1994 Statistics of the year 1995 Statistics of the year 1996 Statistics of the year 1997 Statistics of the year 1998 Statistics of the year 1999 Statistics of the whole period 1991-1999 The best records of each year Result statistics Nation statistics Detailed player statistics About the statistics Tennis links Send me a message

The most constant players of the past 9 years

To find out who were the most constant players of the past years I took their year-end world rankings and calculated the standard deviation (which indicates the variation around the mean value). The higher the standard deviation, the more changes a player had in his year-end rankings.
The constancy is independent of the player's performance level, indicated by the mean value of his ranks in the corresponding period.

                       stddev      mean
Sampras, Pete            1.73      2.00
Krajicek, Richard        9.99     14.56
Rosset, Marc            15.44     30.11
Chang, Michael          15.94     13.78
Pioline, Cedric         17.78     30.22
Ferreira, Wayne         17.94     26.22
Ivanisevic, Goran       18.20     15.00
Fromberg, Richard       20.40     70.67
Tarango, Jeff           22.68     75.33
Clavet, Francisco       23.16     41.67

Index 1991 1992 1993 1994 1995 1996 1997 1998 1999 Total Best Results Nations Players Info Links Mail