# 2005 Qatar Open – Singles

Roger Federer defeated Ivan Ljubičić 6–3, 6–1 to win the 2005 Qatar Open singles competition. He did not lose a single set in the entire tournament.
Nicolas Escudé was the defending champion but did not defend his title.

## Seeds

* Roger Federer (champion)
* Gastón Gaudio (first round)
* Sébastien Grosjean (quarterfinals)
* Mikhail Youzhny (first round)
* Andrei Pavel (first round)
* Ivan Ljubičić (final)
* Feliciano López (quarterfinals)
* Nikolay Davydenko (semifinals)

## Draws
### 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 |
| 1 | Roger Federer | 6 | 6 | | | | |
| 8 | Nikolay Davydenko | 3 | 4 | | | | |
| 8 | Nikolay Davydenko | 3 | 4 | 1 | Roger Federer | 6 | 6 |
| | | | | 6 | Ivan Ljubičić | 3 | 1 |
| 6 | Ivan Ljubičić | 6 | 7$^7$ | 6 | Ivan Ljubičić | 3 | 1 |
| | Albert Costa | 3 | 6$^4$ | | | | |

### Section 1

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | R Federer | 6 | 6 | | | | | | | | | | | | | | |
| | D Ferrer | 1 | 1 | | 1 | R Federer | 6 | 6 | | | | | | | | | |
| | J Hernych | 3 | 5 | | | G Rusedski | 3 | 4 | | | | | | | | | |
| | G Rusedski | 6 | 7 | | | | | | 1 | R Federer | 6 | 6 | | | | | |
| | N Mahut | 6 | 3 | 4 | | | | | 7 | F López | 1 | 2 | | | | | |
| Q | U Vico | 4 | 6 | 6 | Q | U Vico | 2 | 6$^6$ | | | | | | | | | |
| | F Volandri | 5 | 3 | | 7 | F López | 6 | 7$^8$ | | | | | | | | | |
| 7 | F López | 7 | 6 | | | | | | | | | | | 1 | R Federer | 6 | 6 |
| 3 | S Grosjean | 7$^7$ | 6 | | | | | | | | | | | 8 | N Davydenko | 3 | 4 |
| | G Müller | 6$^3$ | 2 | | 3 | S Grosjean | 6 | 6 | | | | | | | | | |
| Q | S Stakhovsky | 0 | 1 | | | H-T Lee | 3 | 0 | | | | | | | | | |
| | H-T Lee | 6 | 6 | | | | | | 3 | S Grosjean | 6 | 3 | 2 | | | | |
| | K Beck | 6 | 6 | | | | | | 8 | N Davydenko | 2 | 6 | 6 | | | | |
| | I Andreev | 3 | 4 | | | K Beck | 6$^2$ | 2 | | | | | | | | | |
| | I Karlović | 6$^7$ | 3 | | 8 | N Davydenko | 7$^7$ | 6 | | | | | | | | | |
| 8 | N Davydenko | 7$^9$ | 6 | | | | | | | | | | | | | | |

### Section 2

| First round | First round | First round | First round | First round | Second round | Second round | Second round | Second round | Second round | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 6 | I Ljubičić | 6 | 6 | | | | | | | | | | | | | | | |
| Q | S Wawrinka | 3 | 4 | | 6 | I Ljubičić | 6 | 6 | | | | | | | | | | |
| WC | M López | 7 | 7$^7$ | | WC | M López | 1 | 4 | | | | | | | | | | |
| | B Ulihrach | 5 | 6$^2$ | | | | | | | 6 | I Ljubičić | 6 | 6$^3$ | 6 | | | | |
| WC | M Abdulla | 2 | 2 | | | | | | | | R Nadal | 2 | 7$^7$ | 3 | | | | |
| | F Verdasco | 6 | 6 | | | F Verdasco | 2 | 4 | | | | | | | | | | |
| | R Nadal | 6 | 7$^7$ | | | R Nadal | 6 | 6 | | | | | | | | | | |
| 4 | M Youzhny | 3 | 6$^3$ | | | | | | | | | | | | 6 | I Ljubičić | 6 | 7$^7$ |
| 5 | A Pavel | 5 | 7$^{10}$ | 4 | | | | | | | | | | | | A Costa | 3 | 6$^4$ |
| Q | M Chiudinelli | 7 | 6$^8$ | 6 | Q | M Chiudinelli | 3 | 2 | | | | | | | | | | |
| | D Sánchez | 3 | 4 | | | A Costa | 6 | 6 | | | | | | | | | | |
| | A Costa | 6 | 6 | | | | | | | | A Costa | 6 | 3 | | | | | |
| | F Santoro | 6 | 6 | | | | | | | | F Santoro | 2 | 0$^r$ | | | | | |
| | T Johansson | 4 | 2 | | | F Santoro | 6 | 4 | 7 | | | | | | | | | |
| WC | G Monfils | 6 | 7$^7$ | | WC | G Monfils | 2 | 6 | 5 | | | | | | | | | |
| 2 | G Gaudio | 4 | 6$^4$ | | | | | | | | | | | | | | | |