# 2008 Fifth Third Bank Tennis Championships – Men's singles

John Isner was the defending champion, but decided not to compete this year.
Somdev Devvarman won the tournament, defeating Robert Kendrick in the final, 6–3, 6–3.

## Seeds

* Dudi Sela (semifinals)
* Bobby Reynolds (second round)
* Robert Kendrick (final)
* Kristian Pless (first round)
* Amer Delić (quarterfinals)
* Harel Levy (first round)
* Brendan Evans (first round)
* Kevin Kim (first round)

## 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 | Semifinals | Final | Final | Final | Final |
| 1 | Dudi Sela | 7 | 1 | 4 | | | | |
| 3 | Robert Kendrick | 5 | 6 | 6 | | | | |
| 3 | Robert Kendrick | 5 | 6 | 6 | 3 | Robert Kendrick | 3 | 3 |
| | | | | | Q | Somdev Devvarman | 6 | 6 |
| | Xavier Malisse | 1$^r$ | | | Q | Somdev Devvarman | 6 | 6 |
| Q | Somdev Devvarman | 4 | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 1 | D Sela | 7 | 6 | | | | | | | | | | | | | | | | |
| Q | R Rizza | 5 | 4 | | 1 | D Sela | 6 | 6 | | | | | | | | | | | |
| | N Okun | 7 | 6 | | | N Okun | 2 | 3 | | | | | | | | | | | |
| | N Lindahl | 5 | 3 | | | | | | | 1 | D Sela | 2 | 7 | 7 | | | | | |
| Q | J O'Neal | 0 | 6 | 6 | | | | | | 5/WC | A Delić | 6 | 6$^6$ | 5 | | | | | |
| SE | É Chvojka | 6 | 3 | 3 | Q | J O'Neal | 4 | 2 | | | | | | | | | | | |
| 5/WC | A Delić | 4 | 7 | 6 | 5/WC | A Delić | 6 | 6 | | | | | | | | | | | |
| | R Hocevar | 6 | 6$^1$ | 4 | | | | | | | | | | | 1 | D Sela | 7 | 1 | 4 |
| 3 | R Kendrick | 1 | 6 | 6 | | | | | | | | | | | 3 | R Kendrick | 5 | 6 | 6 |
| | S González | 6 | 4 | 4 | 3 | R Kendrick | 4 | 6 | 6 | | | | | | | | | | |
| | R Ram | 6 | 6 | | | R Ram | 6 | 4 | 4 | | | | | | | | | | |
| Q | A Francis | 4 | 2 | | | | | | | 3 | R Kendrick | 6 | 6 | | | | | | |
| | M Yani | 7 | 6 | | | | | | | | R DeHeart | 3 | 4 | | | | | | |
| WC | C Buchanan | 6$^3$ | 0 | | | M Yani | 4 | 3$^r$ | | | | | | | | | | | |
| | R De Heart | 7 | 6 | | | R DeHeart | 6 | 4 | | | | | | | | | | | |
| 8 | K Kim | 5 | 4 | | | | | | | | | | | | | | | | |

### Bottom 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 |
| WC | R Williams | 5 | | | | | | | | | | | | | | |
| 6 | H Levy | 2$^r$ | | | WC | R Williams | 3 | 1 | | | | | | | | |
| | X Malisse | 7 | 6 | | | X Malisse | 6 | 6 | | | | | | | | |
| | S Jenkins | 5 | 1 | | | | | | | | X Malisse | 6 | 6 | | | |
| | I van der Merwe | 6 | 6 | | | | | | | | V Estrella | 4 | 3 | | | |
| | A Kuznetsov | 2 | 2 | | | I van der Merwe | 2 | 3 | | | | | | | | |
| | V Estrella | 6 | 6 | | | V Estrella | 6 | 6 | | | | | | | | |
| 4 | K Pless | 3 | 4 | | | | | | | | | | | | X Malisse | 1$^r$ |
| WC | B Koniecko | 6 | 6$^8$ | 6 | | | | | | | | | | Q | S Devvarman | 4 |
| 7 | B Evans | 2 | 7 | 3 | WC | B Koniecko | 1 | 6$^7$ | | | | | | | | |
| | A Stoppini | 7 | 6 | | | A Stoppini | 6 | 7 | | | | | | | | |
| | C Ebelthite | 5 | 4 | | | | | | | | A Stoppini | 6$^5$ | 1 | | | |
| Q | S Devvarman | 7 | 6 | | | | | | | Q | S Devvarman | 7 | 6 | | | |
| | J Baker | 5 | 2 | | Q | S Devvarman | 6 | 7 | 6 | | | | | | | |
| 2 | B Reynolds | 6 | 6 | | 2 | B Reynolds | 7 | 5 | 4 | | | | | | | |
| SE | T Matsui | 4 | 4 | | | | | | | | | | | | | |