Jun Woong-sun
Jun Woong-sun is a professional South Korean tennis player.
Jun reached his highest individual ranking on the ATP Tour on May 26, 2008, when he became World number 230. He plays primarily on the Futures circuit and the Challenger circuit.
Jun has been a member of the South Korean Davis Cup team, posting a 9–5 record in singles and a 3–3 record in doubles in twelve ties played.Tour singles titles – all levels (2–2)
| Outcome | No. | Date | Tournament | Surface | Opponent in the final | Score |
| Winner | 1. | 17 April 2006 | Kofu, Japan | Carpet |  Tetsuya Chaen | 7–6, 7–5 |
| Winner | 2. | 24 April 2006 | Shizuoka, Japan | Carpet |  Kim Son-yong | 2–6, 6–3, 6–3 |
| Runner-up | 1. | 25 June 2007 | Almaty, Kazakhstan | Clay |  Simon Greul | 3–6, 2–6 |
| Runner-up | 2. | 5 May 2008 | Dresden, Germany | Clay | Andreas Beck | 6–2, 3–6, 5–7 |
