# 2018 Savannah Challenger – Singles

Tennys Sandgren was the defending champion but chose not to defend his title.
Hugo Dellien won the title after defeating Christian Harrison 6–1, 1–6, 6–4 in the final.

## Seeds

* Denis Kudla (first round)
* Peter Polansky (first round)
* Donald Young (first round)
* Henri Laaksonen (first round)
* Michael Mmoh (semifinals)
* Blaž Rola (first round)
* Hugo Dellien (champion)
* Evan King (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 | Final |
| 5 | Michael Mmoh | 6 | 5 | 3 | | | | | |
| 7 | Hugo Dellien | 1 | 7 | 6 | | | | | |
| 7 | Hugo Dellien | 1 | 7 | 6 | 7 | Hugo Dellien | 6 | 1 | 6 |
| | | | | | | Christian Harrison | 1 | 6 | 4 |
| | Reilly Opelka | 5 | 2 | | | Christian Harrison | 1 | 6 | 4 |
| | Christian Harrison | 7 | 6 | | | | | | |

### 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 Kudla | 6 | 4 | 4 | | | | | | | | | | | | | | | |
| | M Purcell | 3 | 6 | 6 | | M Purcell | 6 | 6 | | | | | | | | | | | |
| | M Kecmanović | 4 | 4 | | Q | F Coria | 3 | 2 | | | | | | | | | | | |
| Q | F Coria | 6 | 6 | | | | | | | | M Purcell | 3 | 2 | | | | | | |
| WC | F Dancevic | 6 | 6 | | | | | | | 5 | M Mmoh | 6 | 6 | | | | | | |
| | M Krueger | 4 | 4 | | WC | F Dancevic | 4 | 2 | | | | | | | | | | | |
| SE | N Rubin | 4 | 6$^6$ | | 5 | M Mmoh | 6 | 6 | | | | | | | | | | | |
| 5 | M Mmoh | 6 | 7$^8$ | | | | | | | | | | | | 5 | M Mmoh | 6 | 5 | 3 |
| 4 | H Laaksonen | 0 | 4 | | | | | | | | | | | | 7 | H Dellien | 1 | 7 | 6 |
| | E López Pérez | 6 | 6 | | | E López Pérez | 6 | 6$^4$ | 4 | | | | | | | | | | |
| | G Clezar | 6 | 6 | | | G Clezar | 0 | 7$^7$ | 6 | | | | | | | | | | |
| | D Köpfer | 2 | 3 | | | | | | | | G Clezar | 7 | 4 | 6$^6$ | | | | | |
| WC | S Riffice | 6 | 4 | 2 | | | | | | 7 | H Dellien | 5 | 6 | 7$^8$ | | | | | |
| | M Polmans | 1 | 6 | 6 | | M Polmans | 6$^4$ | 4 | | | | | | | | | | | |
| | J Choinski | 6 | 1 | 2 | 7 | H Dellien | 7$^7$ | 6 | | | | | | | | | | | |
| 7 | H Dellien | 2 | 6 | 6 | | | | | | | | | | | | | | | |

### 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 |
| 8 | E King | 2 | 1 | | | | | | | | | | | | | |
| Q | Karue Sell | 6 | 6 | | Q | K Sell | 6$^3$ | 4 | | | | | | | | |
| Q | M Cuevas | 6 | 6 | | Q | M Cuevas | 7$^7$ | 6 | | | | | | | | |
| WC | T Bryde | 1 | 4 | | | | | | | Q | M Cuevas | 3 | 4 | | | |
| | R Opelka | 6 | 6 | | | | | | | | R Opelka | 6 | 6 | | | |
| WC | S Kirchheimer | 4 | 3 | | | R Opelka | 6 | 6 | | | | | | | | |
| | C Garín | 6 | 4 | 6 | | C Garín | 4 | 4 | | | | | | | | |
| 3 | D Young | 3 | 6 | 1 | | | | | | | | | | R Opelka | 5 | 2 |
| 6 | B Rola | 6 | 5 | 4 | | | | | | | | | | C Harrison | 7 | 6 |
| | C Harrison | 2 | 7 | 6 | | C Harrison | 7$^7$ | 6 | | | | | | | | |
| | A Santillan | 6 | 1 | 6$^3$ | | A Arnaboldi | 6$^4$ | 3 | | | | | | | | |
| | A Arnaboldi | 3 | 6 | 7$^7$ | | | | | | | C Harrison | 7 | 6 | | | |
| | J Clarke | 3 | 6 | 6 | | | | | | | T Bellucci | 5 | 4 | | | |
| Q | JP Sorgi | 6 | 3 | 2 | | J Clarke | 7$^7$ | 3 | 3 | | | | | | | |
| | T Bellucci | 6 | 6 | | | T Bellucci | 6$^3$ | 6 | 6 | | | | | | | |
| 2 | P Polansky | 3 | 1 | | | | | | | | | | | | | |