All available race results Roberto Sierra Aguero
| Date | Race | Rank |
| 19/03 | G.P. Cholet - Mauléons-Moulins | 45 |
Rider information for 1989
| Rank | 1500 |
| Score | 0 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | Teka |
| Date | Race | Rank |
| Vuelta a Murcia | ||
| 11/03 | General Classification | 20 |
| 18/03 | Cholet-Pays de la Loire | 55 |
| Critérium International | ||
| 25/03 | General Classification | 67 |
| 24/06 | Campeonato de España en carretera | 51 |
| 19/08 | Meisterschaft von Zürich | 67 |
| 20/10 | Giro di Lombardia | 7 |
Rider information for 1990
| Rank | 994 |
| Score | 6 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | Teka |
| Date | Race | Rank |
| Euskal Bizikleta | ||
| 23/06 | General Classification | 41 |
| 30/06 | Campeonato de España en carretera | 94 |
| 19/10 | Giro di Lombardia | 55 |
Rider information for 1991
| Rank | 1447 |
| Score | 0 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | Clas - Cajastur |
| Date | Race | Rank |
| 04/02 | G.P. d'Ouverture | 27 |
| Etoile de Bessèges | ||
| 09/02 | General Classification | 24 |
| 21/03 | Milano - Sanremo | 118 |
| Critérium International | ||
| 29/03 | General Classification | 106 |
| 05/04 | Ronde van Vlaanderen | 118 |
| 4 Jours de Dunkerque | ||
| 10/05 | General Classification | 35 |
| Euskal Bizikleta | ||
| 21/06 | General Classification | 29 |
| 28/06 | Campeonato de España en carretera | 53 |
| Tour de France | ||
| 04/07 | Prologue | 110 |
| 05/07 | Stage 1 | 51 |
| 06/07 | Stage 2 | 46 |
| 09/07 | Stage 5 | 163 |
| 10/07 | Stage 6 | 104 |
| 11/07 | Stage 7 | 68 |
| 12/07 | Stage 8 | 81 |
| 13/07 | Stage 9 | 63 |
| Vuelta a Galicia | ||
| 14/08 | General Classification | 32 |
| 23/08 | Meisterschaft von Zürich | 61 |
| Volta Ciclista a Catalunya | ||
| 15/09 | General Classification | 55 |
| 17/10 | Giro di Lombardia | 48 |
Rider information for 1992
| Rank | 489 |
| Score | 64 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | Clas - Cajastur |
| Date | Race | Rank |
| Paris - Nice | ||
| 14/03 | General Classification | 47 |
| 20/03 | Milano - Sanremo | 66 |
| 11/04 | Klasika Primavera de Amorebieta | 13 |
| 18/04 | Liège - Bastogne - Liège | 23 |
| Tour de France | ||
| 03/07 | Prologue | 91 |
| 04/07 | Stage 1 | 52 |
| 05/07 | Stage 2 | 41 |
| 06/07 | Stage 3 | 105 |
| 08/07 | Stage 5 | 48 |
| 09/07 | Stage 6 | 122 |
| 10/07 | Stage 7 | 5 |
| 11/07 | Stage 8 | 93 |
| 12/07 | Stage 9 | 43 |
| 14/07 | Stage 10 | 62 |
| 15/07 | Stage 11 | 39 |
| 16/07 | Stage 12 | 96 |
| 17/07 | Stage 13 | 126 |
| 18/07 | Stage 14 | 82 |
| 19/07 | Stage 15 | 37 |
| 22/07 | Stage 16 | 29 |
| 23/07 | Stage 17 | 42 |
| 24/07 | Stage 18 | 48 |
| 25/07 | Stage 19 | 24 |
| 26/07 | Stage 20 | 99 |
| General Classification | 34 | |
| Vuelta a España | ||
| General Classification | 47 |
Rider information for 1993
| Rank | 317 |
| Score | 129 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | Clas - Cajastur |
| Date | Race | Rank |
| Vuelta a Murcia | ||
| 13/03 | General Classification | 14 |
| 19/03 | Milano - Sanremo | 127 |
| Setmana Catalana | ||
| 21/03 | Stage 1 | 28 |
| 03/04 | Ronde van Vlaanderen | 82 |
| G.P. du Midi-Libre | ||
| 18/06 | General Classification | 20 |
| 26/06 | Campeonato de España en carretera | 26 |
| Tour de France | ||
| 02/07 | Prologue | 110 |
| 03/07 | Stage 1 | 105 |
| 04/07 | Stage 2 | 88 |
| 06/07 | Stage 4 | 137 |
| 08/07 | Stage 6 | 93 |
| 09/07 | Stage 7 | 165 |
| 10/07 | Stage 8 | 168 |
| 11/07 | Stage 9 | 96 |
| 12/07 | Stage 10 | 126 |
| 13/07 | Stage 11 | 160 |
| 15/07 | Stage 12 | 108 |
| 16/07 | Stage 13 | 137 |
| 02/10 | Paris - Tours | 113 |
| Vuelta a España | ||
| General Classification | 32 |
Rider information for 1994
| Rank | 286 |
| Score | 193 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. |
| Date | Race | Rank |
| Euskal Bizikleta | ||
| 11/06 | General Classification | 50 |
| Vuelta a España | ||
| 02/09 | Prologue | 81 |
| General Classification | 55 | |
| Giro d'Italia | ||
| General Classification | 79 |
Rider information for 1995
| Rank | 430 |
| Score | 66 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. |
Rider information for 1996
| Rank | 264 |
| Score | 193 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. |
| Date | Race | Rank |
| Vuelta a Murcia | ||
| 08/03 | Stage 4 | 9 |
| 09/03 | General Classification | 24 |
| 22/03 | Milano - Sanremo | 156 |
| 20/04 | Liège - Bastogne - Liège | 100 |
| 23/04 | Scheldeprijs - Schoten | 34 |
| Vuelta a los Valles Mineros | ||
| 05/06 | General Classification | 30 |
| Dauphiné Libéré | ||
| 15/06 | General Classification | 39 |
| Volta Ciclista a Catalunya | ||
| 26/06 | General Classification | 26 |
| Tour de France | ||
| 05/07 | Prologue | 112 |
| 06/07 | Stage 1 | 134 |
| 07/07 | Stage 2 | 121 |
| 08/07 | Stage 3 | 160 |
| 09/07 | Stage 4 | 129 |
| 10/07 | Stage 5 | 108 |
| 11/07 | Stage 6 | 183 |
| 12/07 | Stage 7 | 105 |
| 13/07 | Stage 8 | 89 |
| 14/07 | Stage 9 | 86 |
| 15/07 | Stage 10 | 112 |
| 16/07 | Stage 11 | 114 |
| 18/07 | Stage 12 | 48 |
| 19/07 | Stage 13 | 101 |
| 20/07 | Stage 14 | 53 |
| 21/07 | Stage 15 | 86 |
| 22/07 | Stage 16 | 101 |
| 23/07 | Stage 17 | 70 |
| 24/07 | Stage 18 | 56 |
| 25/07 | Stage 19 | 63 |
| 26/07 | Stage 20 | 55 |
| 27/07 | Stage 21 | 105 |
| General Classification | 78 | |
| 24/08 | Meisterschaft von Zürich | 64 |
Rider information for 1997
| Rank | 439 |
| Score | 94 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. |
Rider information for 1998
| Rank | 462 |
| Score | 78 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. - Deutsche Bank |
| Date | Race | Rank |
| 21/02 | Trofeo Luis Puig | 79 |
| Volta a la Comunitat Valenciana | ||
| 27/02 | General Classification | 44 |
| Tirreno - Adriatico | ||
| 17/03 | General Classification | 24 |
Rider information for 1999
| Rank | 628 |
| Score | 51 |
| Name | Roberto SIERRA AGUERO |
| Country | Spain |
| Team | O.N.C.E. - Deutsche Bank |