Biggest races where rider never competed
Major races where Isa Pieterse never competed in.
| # | Race | Class |
|---|---|---|
| 1 | World Championships WE - Road Race | WC |
| 2 | La Flèche Wallonne Féminine | 1.WWT |
| 3 | Giro d'Italia Internazionale Femminile | 2.WWT |
| 4 | Ronde van Vlaanderen / Tour des Flandres WE | 1.WWT |
| 5 | Trofeo Alfredo Binda - Comune di Cittiglio | 1.WWT |
| 6 | GP de Plouay - Lorient Agglomeration | 1.WWT |
| 7 | Boels Rental Ladies Tour | 2.WWT |
| 8 | World Championships WE - ITT | WC |
| 9 | Women's WorldTour Ronde van Drenthe | 1.WWT |
| 10 | Premondiale Giro Toscana Int. Femminile - Memorial Michela Fanini | 2.2 |
| 11 | Crescent Vårgårda | 1.WWT |
| 12 | Omloop Het Nieuwsblad WE | 1.1 |
| 13 | Internationale LOTTO Thüringen Ladies Tour | 2.1 |
| 14 | Emakumeen Bira | 2.1 |
| 15 | Durango-Durango Emakumeen Saria | 1.2 |
| 16 | Drentse Acht van Westerveld | 1.2 |
| 17 | Crescent Vårgårda TTT | 1.WWT |
| 18 | Gent-Wevelgem In Flanders Fields WE | 1.WWT |
| 19 | Festival Elsy Jacobs | 2.1 |
| 20 | Strade Bianche Donne | 1.WWT |
| 21 | Olympic Games WE - Road Race | Olympics |
| 22 | Giro del Trentino Alto Adige - Sudtirol | 1.1 |
| 23 | La Course by Le Tour de France | 1.WWT |
| 24 | Amstel Gold Race | 1.WWT |
| 25 | OVO Energy Women's Tour | 2.WWT |