2018 Stockton Challenger – Men's singles
# 2018 Stockton Challenger – Men's singles

Cameron Norrie was the defending champion but chose not to defend his title.

Lloyd Harris won the title after defeating Marc Polmans 6–2, 6–2 in the final.

## Seeds

* Jordan Thompson (semifinals)
* Reilly Opelka (first round)
* Henri Laaksonen (first round)
* Lloyd Harris (champion)
* Casper Ruud (second round)
* Noah Rubin (quarterfinals)
* Alex Bolt (second round)
* Marc Polmans (final)

## 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 |
| - | - | - | - | - | - | - | - |
| 1 | Jordan Thompson | $6^6$ | 2 | | | | |
| 4 | Lloyd Harris | $7^8$ | 6 | | | | |
| 4 | Lloyd Harris | $7^8$ | 6 | 4 | Lloyd Harris | 6 | 6 |
| | | | | 8 | Marc Polmans | 2 | 2 |
| 8 | Marc Polmans | 6 | 6 | 8 | Marc Polmans | 2 | 2 |
| | Maxime Janvier | 1 | 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 |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 1 | J Thompson | 6 | 6 | | | | | | | | | | | | | | | |
| Q | P Kypson | 2 | 2 | | 1 | J Thompson | 4 | 6 | 6 | | | | | | | | | |
| Alt | K Uchida | 6 | $6^3$ | 6 | Alt | K Uchida | 6 | 3 | 1 | | | | | | | | | |
| Q | T Paul | 1 | $7^7$ | 0 | | | | | | 1 | J Thompson | $6^4$ | $7^7$ | 6 | | | | |
| Q | W Blumberg | 3 | 6 | 6 | | | | | | 6 | N Rubin | $7^7$ | $6^2$ | 3 | | | | |
| | JC Aragone | 6 | 2 | 2 | Q | W Blumberg | 1 | 6 | 4 | | | | | | | | | |
| WC | J Brooksby | 2 | 4 | | 6 | N Rubin | 6 | 4 | 6 | | | | | | | | | |
| 6 | N Rubin | 6 | 6 | | | | | | | | | | | | 1 | J Thompson | $6^6$ | 2 |
| 4 | L Harris | 6 | 6 | | | | | | | | | | | | 4 | L Harris | $7^8$ | 6 |
| | D Köpfer | 3 | 4 | | 4 | L Harris | 6 | 6 | | | | | | | | | | |
| WC | T-S Kwiatkowski | 3 | $7^7$ | 6 | WC | T-S Kwiatkowski | 2 | 4 | | | | | | | | | | |
| | L Miedler | 6 | $6^5$ | 4 | | | | | | 4 | L Harris | $6^6$ | 6 | 6 | | | | |
| | C Eubanks | 6 | $7^7$ | | | | | | | | C Eubanks | $7^8$ | 4 | 3 | | | | |
| | C İlkel | 4 | $6^4$ | | | C Eubanks | 6 | $7^{10}$ | | | | | | | | | | |
| | J Choinski | 3 | 0 | | 5 | C Ruud | 1 | $6^8$ | | | | | | | | | | |
| 5 | C Ruud | 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 | Quarterfinals | Semifinals | Semifinals | Semifinals | Semifinals |
| - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| 8 | M Polmans | 6 | 6 | | | | | | | | | | | | | | | |
| | J Clarke | 3 | 0 | | 8 | M Polmans | $6^4$ | 6 | 6 | | | | | | | | | |
| | M Krueger | 3 | 6 | 6 | | M Krueger | $7^7$ | 4 | 3 | | | | | | | | | |
| | J-P Smith | 6 | 3 | 4 | | | | | | 8 | M Polmans | 4 | 6 | 6 | | | | |
| | D Evans | 6 | 6 | | | | | | | | L Broady | 6 | 4 | 2 | | | | |
| SE | J Duckworth | 2 | 2 | | | D Evans | 0 | $7^7$ | 4 | | | | | | | | | |
| | L Broady | 3 | 6 | 6 | | L Broady | 6 | $6^3$ | 6 | | | | | | | | | |
| 3 | H Laaksonen | 6 | 4 | 4 | | | | | | | | | | | 8 | M Polmans | 6 | 6 |
| 7 | A Bolt | 6 | 6 | | | | | | | | | | | | | M Janvier | 1 | 4 |
| WC | T Fawcett | 4 | 1 | | 7 | A Bolt | 4 | 3 | | | | | | | | | | |
| | D King | 6 | 6 | | | D King | 6 | 6 | | | | | | | | | | |
| WC | Philip Hjorth | 1 | 1 | | | | | | | | D King | 5 | 7 | $6^3$ | | | | |
| Q | A Sarkissian | 6 | $6^4$ | 6 | | | | | | | M Janvier | 7 | 5 | $7^7$ | | | | |
| | M Banes | 4 | $7^7$ | 1 | Q | A Sarkissian | $6^1$ | 0 | | | | | | | | | | |
| | M Janvier | $6^4$ | 6 | 6 | | M Janvier | $7^7$ | 6 | | | | | | | | | | |
| 2 | R Opelka | $7^7$ | 4 | 4 | | | | | | | | | | | | | | |
