Helle Nielsen
Helle Nielsen is a Danish badminton player. In 1999, she won a silver and two bronzes at the European Junior Badminton Championships in Glasgow, Scotland in the girls doubles, mixed doubles and mixed team respectively.
In 2008, she won the bronze medal at the European Championships in mixed doubles with Carsten Mogensen.
Achievements
European Championships
Mixed doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2008 | Messecenter, Herning, Denmark |  Carsten Mogensen |  Anthony Clark Donna Kellogg | 18–21, 19–21 | Bronze |
European Junior Championships
Mixed doubles| Year | Venue | Partner | Opponent | Score | Result |
| 1999 | Kelvin Hall, Glasgow, Scotland | Karina Sørensen |  Petra Overzier Anne Hönscheid | 2–15, 15–8, 9–15 | Silver |
Mixed doubles
| Year | Venue | Partner | Opponent | Score | Result |
| 1999 | Kelvin Hall, Glasgow, Scotland | Jonas Glyager Jensen | Sebastian Schmidt Anne Hönscheid | 15–9, 10–15, 6–15 | Bronze |
BWF Grand Prix
The BWF Grand Prix has two level such as Grand Prix and Grand Prix Gold. It is a series of badminton tournaments, sanctioned by Badminton World Federation since 2007.Women's doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2009 | Bitburger Open | Marie Røpke | Line Damkjær Kruse Mie Schjoett-Kristensen | 18–21, 21–19, 21–19 | Winner |
| 2008 | Bitburger Open | Marie Røpke |  Shendy Puspa Irawati Meiliana Jauhari | 21–15, 21–18 | Winner |
| 2004 | Dutch Open | Pernille Harder | Lena Frier Kristiansen Kamilla Rytter Juhl | 12–15, 8–15 | Runner-up |
Mixed doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2005 | Denmark Open | Lars Paaske | Thomas Laybourn Kamilla Rytter Juhl | 8–15, 9–15 | Runner-up |
BWF International Challenge/Series
Women's doubles| Year | Tournament | Partner | Opponent | Score | Result |
| 2010 | Swedish International Stockholm | Marie Røpke |  Lotte Jonathans Paulien van Dooremalen | 17–21, 21–15, 21–18 | Winner |
| 2009 | Norwegian International | Marie Røpke | Samantha Barning Eefje Muskens | 21–13, 21–18 | Winner |
| 2008 | Irish International | Marie Røpke | Patty Stolzenbach Paulien van Dooremalen | 23–25, 21–17, 21–8 | Winner |
| 2008 | Czech International | Marie Røpke |  Séverine Corvilain Nathalie Descamps | 21–14, 21–15 | Winner |
| 2004 | Irish International | Pernille Harder |  Chor Hooi Yee Lim Pek Siah | 15–7, 15–6 | Winner |
| 2003 | Dutch International | Majken Vange |  Elena Sukhareva Natalya Gorodnicheva | 11–4, 11–8 | Winner |
| 2003 | Portugal International | Julie Houmann | Ella Tripp Joanne Wright | 11–1, 3–11, 11–3 | Winner |
| 2002 | Le Volant d'Or de Toulouse | Majken Vange |  Akiko Nakashima Chihiro Ohsaka | 6–11, 10–13 | Runner-up |
| 2002 | Austrian International | Lene Mørk | Marina Yakusheva Elena Shimko | 7–4, 7–0, 7–5 | Winner |
| 2002 | Portugal International | Lene Mørk | Kamilla Rytter Juhl Lena Frier Kristiansen | 7–2, 7–3, 7–0 | Winner |
| 2001 | Irish International | Lene Mørk | Kamilla Rytter Juhl Lena Frier Kristiansen | 7–3, 7–3, 7–2 | Winner |
Mixed doubles
| Year | Tournament | Partner | Opponent | Score | Result |
| 2008 | Czech International | Rasmus Bonde | Mikkel Delbo Larsen Mie Schjøtt-Kristensen | 21–12, 21–11 | Winner |
| 2008 | Dutch International | Rasmus Bonde | Jacob Chemnitz Marie Røpke | 21–15, 21–12 | Winner |
| 2004 | Croatian International | Rasmus Andersen |  Svetoslav Stoyanov Victoria Wright | 12–15, 17–15 | Winner |
| 2003 | Dutch International | Peter Steffensen | Jonas Glyager Jensen Majken Vange | 11–9, 11–6 | Winner |
| 2003 | Portugal International | Carsten Mogensen |  Fredrik Bergström Johanna Persson | 13–10, 5–11, 7–11 | Runner-up |
| 2002 | Austrian International | Kasper Kiim Jensen | Dennis Lens Johanna Persson | 8–6, 7–8, 4–7, 6–8 | Runner-up |
| 2001 | Irish International | Bo Rafn |  Robert Blair Natalie Munt | 4–7, 7–3, 1–7, 5–7 | Runner-up |