Denmark | Australian Open | French Open | Open University | open source | Denmark national football team | U.S. Open | Margrethe II of Denmark | Christian IV of Denmark | Wacken Open Air | The Open Championship | Zealand (Denmark) | Technical University of Denmark | U.S. Open (tennis) | Alexandra of Denmark | Christian V of Denmark | All England Open Badminton Championships | U.S. Open (golf) | Open Source | Open-pit mining | 2006 Australian Open | Open Software Foundation | Indira Gandhi National Open University | Lamar Hunt U.S. Open Cup | Christian I of Denmark | Anne of Denmark | Princess Benedikte of Denmark | National Museum of Denmark | Christian VII of Denmark | 2005 Australian Open – Men's Singles |
Internationally she was most successful in women's doubles, usually partnered with Joke van Beusekom, winning at the (first) European Youth Championships in 1969, the Denmark Open in 1972 and 1975, the Irish International in 1975, and the Dutch Open in 1977.
In 1980, he won the Danish Open, the Swedish Open and became the first Indian to win the men's singles title at the All England Championship with a victory over Indonesian rival Liem Swie King.
A few weeks later he entered his first Super Series event in singles, the Denmark Open 2010; making it through the qualifying stages before losing out to compatriot and eventual winner Jan Ø. Jørgensen in the second round.
Another remarkable achievement was throwing a nine-darter at the Denmark Open in 2008, a tournament in which he would lose the final against the Polish player Krzysztof Ratajski.