# 2017 Fairfield Challenger – Singles

Santiago Giraldo was the defending champion but chose not to defend his title.
Mackenzie McDonald won the title after defeating Bradley Klahn 6–4, 6–2 in the final.

## Seeds

* Ernesto Escobedo (second round)
* Tennys Sandgren (quarterfinals)
* Bjorn Fratangelo (quarterfinals)
* Maximilian Marterer (semifinals)
* Cameron Norrie (withdrew)
* Stefan Kozlov (first round)
* Ramkumar Ramanathan (first round)
* Nikola Milojević (quarterfinals)
* Michael Mmoh (second 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 | Final | Final | Final | Final |
| SE | Bradley Klahn | 6 | 6 | | | | |
| 4 | Maximilian Marterer | 1 | 3 | | | | |
| 4 | Maximilian Marterer | 1 | 3 | SE | Bradley Klahn | 4 | 2 |
| | | | | | Mackenzie McDonald | 6 | 6 |
| Q | Christopher O'Connell | 4 | 5 | | Mackenzie McDonald | 6 | 6 |
| | Mackenzie McDonald | 6 | 7 | | | | |

### 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 |
| 1 | E Escobedo | 5 | 6 | 6 | | | | | | | | | | | | | | |
| WC | A Sarkissian | 7 | 0 | 2 | 1 | E Escobedo | 4 | 7$^9$ | 3 | | | | | | | | | |
| SE | B Klahn | 1 | 6 | 6 | SE | B Klahn | 6 | 6$^7$ | 6 | | | | | | | | | |
| SE | K King | 6 | 1 | 1 | | | | | | SE | B Klahn | 4 | 6 | 6 | | | | |
| | F Auger-Aliassime | 4 | 6 | 6 | | | | | | 8 | N Milojević | 6 | 3 | 4 | | | | |
| Q | J Šátral | 6 | 3 | 4 | | F Auger-Aliassime | 2 | 4 | | | | | | | | | | |
| | B Schnur | 1 | 5 | | 8 | N Milojević | 6 | 6 | | | | | | | | | | |
| 8 | N Milojević | 6 | 7 | | | | | | | | | | | | SE | B Klahn | 6 | 6 |
| 4 | M Marterer | 6 | 7$^7$ | | | | | | | | | | | | 4 | M Marterer | 1 | 3 |
| | B Klein | 4 | 6$^2$ | | 4 | M Marterer | 6 | 6 | | | | | | | | | | |
| Q | R Roelofse | 4 | 4 | | LL | S Bangoura | 3 | 2 | | | | | | | | | | |
| LL | S Bangoura | 6 | 6 | | | | | | | 4 | M Marterer | 6 | 7 | | | | | |
| WC | A Geller | 2 | 4 | | | | | | | Q | S Fanselow | 4 | 5 | | | | | |
| Q | S Fanselow | 6 | 6 | | Q | S Fanselow | 7$^7$ | 7$^7$ | | | | | | | | | | |
| WC | E King | 1 | 6 | 6$^5$ | 9 | M Mmoh | 6$^2$ | 6$^5$ | | | | | | | | | | |
| 9 | M Mmoh | 6 | 4 | 7$^7$ | | | | | | | | | | | | | | |

### 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| 7 | R Ramanathan | 4 | 6 | 4 | | | | | | | | | | | | | | |
| | T Kamke | 6 | 4 | 6 | | T Kamke | 6 | 3 | 4 | | | | | | | | | |
| | D Kudla | 5 | 3 | | Q | C O'Connell | 0 | 6 | 6 | | | | | | | | | |
| Q | C O'Connell | 7 | 6 | | | | | | | Q | C O'Connell | 7$^7$ | 5 | 6 | | | | |
| LL | A González | 6 | 6 | | | | | | | 3 | B Fratangelo | 6$^5$ | 7 | 4 | | | | |
| | J-P Smith | 1 | 4 | | LL | A González | 6$^5$ | 6$^5$ | | | | | | | | | | |
| LL | A Ward | 6 | 6$^5$ | 4 | 3 | B Fratangelo | 7$^7$ | 7$^7$ | | | | | | | | | | |
| 3 | B Fratangelo | 3 | 7$^7$ | 6 | | | | | | | | | | | Q | C O'Connell | 4 | 5 |
| 6 | S Kozlov | 4 | 7 | 1 | | | | | | | | | | | | M McDonald | 6 | 7 |
| | M McDonald | 6 | 5 | 6 | | M McDonald | 6 | 6 | | | | | | | | | | |
| PR | F Dancevic | 4 | 4 | | | D King | 3 | 1 | | | | | | | | | | |
| | D King | 6 | 6 | | | | | | | | M McDonald | 7$^7$ | 6 | | | | | |
| | S Groth | 4 | 6 | 5 | | | | | | 2 | T Sandgren | 6$^3$ | 2 | | | | | |
| | N Rubin | 6 | 3 | 7 | | N Rubin | 6$^1$ | 3 | | | | | | | | | | |
| | M Krueger | 3 | 7$^7$ | 6$^5$ | 2 | T Sandgren | 7$^7$ | 6 | | | | | | | | | | |
| 2 | T Sandgren | 6 | 6$^2$ | 7$^7$ | | | | | | | | | | | | | | |