The 2009 Davidoff Swiss Indoors was a men's tennis tournament played on indoor hard courts. It was the 40th edition of the event known that year as the Davidoff Swiss Indoors, and was part of the 500 Series of the 2009 ATP World Tour. It was held at the St. Jakobshalle in Basel, Switzerland, from 2 November through 8 November 2009. Second-seeded Novak Djokovic won the singles title.
See main article: 2009 Davidoff Swiss Indoors – Singles. 
Novak Djokovic defeated Roger Federer, 6–4, 4–6, 6–2
See main article: 2009 Davidoff Swiss Indoors – Doubles. 
Daniel Nestor / Nenad Zimonjić defeated 
Bob Bryan / Mike Bryan, 6–2, 6–3
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Roger Federer | 1 | 1 | ||
| Novak Djokovic | 3 | 2 | ||
| Fernando González | 11 | 3 | ||
| Marin Čilić | 13 | 4 | ||
| Radek Štěpánek | 14 | 5 | ||
| Stanislas Wawrinka | 21 | 6 | ||
| James Blake | 23 | 7 | ||
| Philipp Kohlschreiber | 24 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received the lucky loser spot:
