The 2009 SAT Khorat Open was a professional tennis tournament played on outdoor hard courts. It was part of the 2009 ATP Challenger Tour. It took place in Khorat, Thailand between 23 and 29 March 2009.
| Nationality | Player | Ranking* | Seeding | |
|---|---|---|---|---|
| Andreas Beck | 86 | 1 | ||
 Japan | Go Soeda | 117 | 2 | |
 Australia | Chris Guccione | 134 | 3 | |
 France | Mathieu Montcourt | 136 | 4 | |
 Russian Federation | Mikhail Elgin | 138 | 5 | |
| Daniel Brands | 148 | 6 | ||
 India | Somdev Devvarman | 150 | 7 | |
 Thailand | Danai Udomchoke | 158 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received Special exempt into the main draw:
See main article: 2009 SAT Khorat Open – Singles. Andreas Beck def. 
Filip Prpic, 7–5, 6–3
See main article: 2009 SAT Khorat Open – Doubles. Rohan Bopanna / 
Aisam-ul-Haq Qureshi def. Sanchai Ratiwatana / Sonchat Ratiwatana, 6–3, 6–7(5), [10–5]
