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Analysis of doping infractions in different professional tournaments during the 2003-2009 period.
| Grand Slams | Davis Cup | Fed Cup | Other Tournaments | Total | |
|---|---|---|---|---|---|
| Total Samples | 5452 | 440 | 355 | 6817 | 13340 |
| Sample Average/year | 778.8 | 62.8 | 50.7 | 973.8 | 1905.7 ±174.5 |
| Total Doping Offences | 10 | 3 | 0 | 34 | 52 |
| Doping Offences/year | 1.42 | 0.42 | 0 | 4.8 | 7.4 ± 4.1 |
| Incidence Offences/sample (%) | 0.18b | 0.68a-b | 0a | 0.4 | 0.38 |
a p = 0.11
b p = 0.0082
