| Knud Aage Nielsen | |
| Birth Date: | 1 March 1937 |
| Country: | Denmark |
Knud Aage Nielsen (born 1937) is a retired male badminton player from Denmark.
With a singles game that featured consistency and excellent mobility, Nielsen played at a high international level from the late 1950s through the mid-1960s. In 1964 he won men's singles at the All England Open Badminton Championships, then considered the unofficial World Badminton Championships, narrowly defeating fellow Dane Henning Borch in the final.[1] He played Thomas Cup (men's international team competition) singles for Denmark in the '60–'61 and '63–'64campaigns, scoring Denmark's only singles victory in its controversial '64 Challenge Round loss to Indonesia.[2]
He is the younger brother of Poul-Erik Nielsen three times an All England doubles champion.[3]
Nielsen appeared in the Danish TV series Make badminton great again from 2022 about the history of Danish badminton.
Men's singles
| Year | Tournament | Opponent | Score | Result | |
|---|---|---|---|---|---|
| 1958 | Norwegian International | Winner | |||
| 1959 | Dutch Open | Ferry Sonneville | 18–13, 15–9 | Winner | |
| 1964 | German Open | Erland Kops | 7–15, 13–15 | Runner-up | |
| 1964 | All England | Henning Borch | 8–15, 17–15, 15–4 | Winner | |
| 1966 | Dutch Open | Wolfgang Bochow | 18–15, 15–9 | Winner | |
| 1966 | German Open | Erland Kops | Runner-up | ||
| 1966 | Denmark Open | Svend Pri | 3–15, 9–15 | Runner-up |
Men's doubles
| Year | Tournament | Partner | Opponent | Score | Result | |
|---|---|---|---|---|---|---|
| 1961 | Dutch Open | Ole Mertz | Wong B. K. Yeoh Kean Hua | 18–15, 15–9 | Winner | |
| 1963 | Swedish Open | Henning Borch | Winner | |||
| 1965 | Swedish Open | Erland Kops | Winner | |||
| 1966 | Dutch Open | Elo Hansen | Punch Gunalan Oon Chong Hau | 4–15, 4–15 | Runner-up |
Mixed doubles