# 2009 LA Tennis Open – Singles

Juan Martín del Potro was the defending champion, but chose not to participate that year.

## Seeds

The top four seeds receive a bye into the second round.
* Tommy Haas (semifinals)
* Mardy Fish (quarterfinals, withdrew because of abdominal strain)
* Dmitry Tursunov (second round, retired because of a left ankle injury)
* Dudi Sela (quarterfinals)
* Igor Kunitsyn (second round)
* Sam Querrey (champion)
* Benjamin Becker (first round)
* Marat Safin (quarterfinals)

## Main draw
### Key

* Q = Qualifier
* WC = Wild card
* LL = Lucky loser
* Alt = Alternate
* SE = Special exempt
* PR = Protected ranking
* ITF = ITF entry
* JE = Junior exempt
* w/o = Walkover
* r = Retired
* d = Defaulted
* SR = Special ranking

### Finals

| Semifinals | Semifinals | Semifinals | Semifinals | Final | Final | Final | Final | Final |
| 1 | Tommy Haas | 3 | 5 | | | | | |
| 6 | Sam Querrey | 6 | 7 | | | | | |
| 6 | Sam Querrey | 6 | 7 | 6 | Sam Querrey | 6 | 3 | 6 |
| | | | | Q | Carsten Ball | 4 | 6 | 1 |
| Q | Carsten Ball | 7 | 7$^7$ | Q | Carsten Ball | 4 | 6 | 1 |
| | Leonardo Mayer | 5 | 6$^3$ | | | | | |

### Top half

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| | | | | | 1 | T Haas | 6 | 6 | | | | | | | | | |
| WC | J Levine | 6 | 6 | | WC | J Levine | 1 | 3 | | | | | | | | | |
| | B Reynolds | 2 | 3 | | | | | | | 1 | T Haas | 7$^7$ | 6 | | | | |
| | Y-h Lu | 5 | 2 | | | | | | | 8 | M Safin | 6$^3$ | 2 | | | | |
| | E Gulbis | 7 | 6 | | | E Gulbis | 6 | 3 | 4 | | | | | | | | |
| SE | R Ginepri | 6 | 3 | 4 | 8 | M Safin | 2 | 6 | 6 | | | | | | | | |
| 8 | M Safin | 3 | 6 | 6 | | | | | | | | | | 1 | T Haas | 3 | 5 |
| | | | | | | | | | | | | | | 6 | S Querrey | 6 | 7 |
| | | | | | 4 | D Sela | 6 | 3 | 6 | | | | | | | | |
| | V Spadea | 0 | 0 | | | R Kendrick | 4 | 6 | 1 | | | | | | | | |
| | R Kendrick | 6 | 6 | | | | | | | 4 | D Sela | 3 | 5 | | | | |
| WC | T Dent | 4 | 6 | 3 | | | | | | 6 | S Querrey | 6 | 7 | | | | |
| Q | R Sweeting | 6 | 2 | 6 | Q | R Sweeting | 3 | 7$^7$ | 3 | | | | | | | | |
| | D Istomin | 2 | 0 | | 6 | S Querrey | 6 | 6$^5$ | 6 | | | | | | | | |
| 6 | S Querrey | 6 | 6 | | | | | | | | | | | | | | |

### Bottom half

| First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | B Becker | 6$^8$ | 6$^3$ | | | | | | | | | | | | | |
| | J Isner | 7$^{10}$ | 7$^7$ | | J Isner | 6 | 7$^{13}$ | | | | | | | | | |
| SE | F Dancevic | 6$^3$ | 3 | | M Baghdatis | 3 | 6$^{11}$ | | | | | | | | | |
| | M Baghdatis | 7$^7$ | 6 | | | | | | | J Isner | 4 | 4 | | | | |
| Q | C Ball | 6 | 7$^8$ | | | | | | Q | C Ball | 6 | 6 | | | | |
| | M Gicquel | 2 | 6$^6$ | Q | C Ball | 6 | 0 | | | | | | | | | |
| | | | | 3 | D Tursunov | 4 | 1$^r$ | | | | | | | | | |
| | | | | | | | | | | | | | Q | C Ball | 7 | 7$^7$ |
| 5 | I Kunitsyn | 7 | 6 | | | | | | | | | | | L Mayer | 5 | 6$^3$ |
| Q | S Devvarman | 5 | 2 | 5 | I Kunitsyn | 6$^5$ | 7$^9$ | 3 | | | | | | | | |
| | L Mayer | 6 | 6 | | L Mayer | 7$^7$ | 6$^7$ | 6 | | | | | | | | |
| Q | J Ouanna | 2 | 3 | | | | | | | L Mayer | w/o | | | | | |
| WC | C Guccione | 6 | 6 | | | | | | 2 | M Fish | | | | | | |
| | K Kim | 1 | 4 | WC | C Guccione | 7$^7$ | 6$^{12}$ | 4 | | | | | | | | |
| | | | | 2 | M Fish | 6$^3$ | 7$^{14}$ | 6 | | | | | | | | |