# 2018 Oracle Challenger Series – Newport Beach – Men's singles

This was the first edition of the tournament.
Taylor Fritz won the title after defeating Bradley Klahn 3–6, 7–5, 6–0 in the final.

## Seeds

* Kei Nishikori (first round)
* Frances Tiafoe (first round)
* Taylor Fritz (champion)
* Bjorn Fratangelo (second round, retired)
* Cameron Norrie (first round)
* Alexander Bublik (second round)
* Ernesto Escobedo (first round)
* Yannick Hanfmann (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 |
| WC | Reilly Opelka | 3 | 6$^6$ | | | | | | |
| 3 | Taylor Fritz | 6 | 7$^8$ | | | | | | |
| 3 | Taylor Fritz | 6 | 7$^8$ | | 3 | Taylor Fritz | 3 | 7 | 6 |
| | | | | | | Bradley Klahn | 6 | 5 | 0 |
| Q | Christian Garín | 3 | 6 | 4 | | Bradley Klahn | 6 | 5 | 0 |
| | Bradley Klahn | 6 | 0 | 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 | Semifinals | Semifinals | Semifinals | Semifinals |
| 1/WC | K Nishikori | 3 | 6 | 4 | | | | | | | | | | | | | |
| Q | D Novikov | 6 | 3 | 6 | Q | D Novikov | 4 | 4 | | | | | | | | | |
| | D Kudla | 6$^5$ | 3 | | WC | R Opelka | 6 | 6 | | | | | | | | | |
| WC | R Opelka | 7$^7$ | 6 | | | | | | | WC | R Opelka | 7 | 6 | | | | |
| | H Laaksonen | 6$^9$ | 2 | | | | | | | | M Bachinger | 5 | 4 | | | | |
| | F Peliwo | 7$^{11}$ | 6 | | | F Peliwo | 3 | 6$^3$ | | | | | | | | | |
| | M Bachinger | 6 | 7$^9$ | | | M Bachinger | 6 | 7$^7$ | | | | | | | | | |
| 7 | E Escobedo | 3 | 6$^7$ | | | | | | | | | | | WC | R Opelka | 3 | 6$^6$ |
| 3 | T Fritz | 6 | 6 | | | | | | | | | | | 3 | T Fritz | 6 | 7$^8$ |
| Q | G Olaso | 3 | 4 | | 3 | T Fritz | 6 | 6 | | | | | | | | | |
| | M Arévalo | 4 | 4 | | WC | T-S Kwiatkowski | 4 | 4 | | | | | | | | | |
| WC | T-S Kwiatkowski | 6 | 6 | | | | | | | 3 | T Fritz | 6 | 6 | | | | |
| | N Rubin | 7$^7$ | 6 | | | | | | | | N Rubin | 3 | 2 | | | | |
| | T Smyczek | 6$^5$ | 2 | | | N Rubin | 6$^6$ | 6 | 7$^{10}$ | | | | | | | | |
| | P Polansky | 6 | 3 | 0 | 6 | A Bublik | 7$^8$ | 4 | 6$^8$ | | | | | | | | |
| 6 | A Bublik | 3 | 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 | Semifinals |
| 5 | C Norrie | 2 | 4 | | | | | | | | | | | | | | | | |
| | M Mmoh | 6 | 6 | | | M Mmoh | 6 | 2 | 1 | | | | | | | | | | |
| | T Ito | 7$^7$ | 4 | 1$^r$ | | D King | 1 | 6 | 6 | | | | | | | | | | |
| | D King | 6$^4$ | 6 | 2 | | | | | | | D King | 7 | 2 | 3 | | | | | |
| WC | T Paul | 4 | 3 | | | | | | | Q | C Garín | 5 | 6 | 6 | | | | | |
| Q | C Garín | 6 | 6 | | Q | C Garín | 6 | 1 | | | | | | | | | | | |
| Q | T Fawcett | 4 | 2 | | 4 | B Fratangelo | 3 | 0$^r$ | | | | | | | | | | | |
| 4 | B Fratangelo | 6 | 6 | | | | | | | | | | | | Q | C Garín | 3 | 6 | 4 |
| 8 | Y Hanfmann | 4 | 3 | | | | | | | | | | | | | B Klahn | 6 | 0 | 6 |
| | B Klahn | 6 | 6 | | | B Klahn | 6 | 1 | 6 | | | | | | | | | | |
| | M Krueger | 7$^7$ | 6 | | | M Krueger | 3 | 6 | 4 | | | | | | | | | | |
| | G Oliveira | 6$^5$ | 2 | | | | | | | | B Klahn | 7$^9$ | 6 | | | | | | |
| | G Clezar | 2 | 3 | | | | | | | | M Kecmanović | 6$^7$ | 1 | | | | | | |
| | S Kozlov | 6 | 6 | | | S Kozlov | 3 | 4 | | | | | | | | | | | |
| | M Kecmanović | 6 | 3 | 6 | | M Kecmanović | 6 | 6 | | | | | | | | | | | |
| 2 | F Tiafoe | 4 | 6 | 3 | | | | | | | | | | | | | | | |