2021 Graded Racing Sire statistics
Results for offspring of sire Rio Quattro - Includes races up to and including 16/10/21
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| Track | Runners | Winners | Win rate |
| CentralPark | 77 | 13 | 16.88 |
| Crayford | 19 | 4 | 21.05 |
| Doncaster | 146 | 34 | 23.28 |
| Harlow | 100 | 18 | 18 |
| Henlow | 102 | 17 | 16.66 |
| Hove | 90 | 15 | 16.66 |
| Kinsley | 12 | 1 | 8.333 |
| Monmore | 17 | 3 | 17.64 |
| Newcastle | 18 | 3 | 16.66 |
| Nottingham | 10 | 1 | 10 |
| PelawGrange | 28 | 7 | 25 |
| PerryBarr | 45 | 6 | 13.33 |
| Romford | 9 | 1 | 11.11 |
| Sheffield | 25 | 3 | 12 |
| Sunderland | 24 | 3 | 12.5 |
| Swindon | 11 | 1 | 9.090 |
| Towcester | 25 | 4 | 16 |
| Yarmouth | 71 | 8 | 11.26 |
| OVERALL | 829 | 142 | 17.12 |