2018 Oracle Challenger Series – Newport Beach

{{Use mdy dates|date=January 2025}}

{{Infobox tennis event|2018|Oracle Challenger Series – Newport Beach|

| date=January 22–28

| edition=1st

| draw=32S / 16D

| surface=Hard, outdoor

| prize_money=$150,000+H (ATP)
$150,000 (WTA)

| category=ATP Challenger Tour
WTA 125K series

| location=Newport Beach, United States

| venue=Newport Beach Tennis Club

| champms={{flagicon|USA}} Taylor Fritz

| champmd={{flagicon|USA}} James Cerretani / {{flagicon|IND}} Leander Paes

| champws={{flagicon|USA}} Danielle Collins

| champwd={{flagicon|JPN}} Misaki Doi / {{flagicon|SUI}} Jil Teichmann

}}

The 2018 Oracle Challenger Series – Newport Beach was a professional tennis tournament played on outdoor hard courts. It was the first edition of the tournament, which was part of the 2018 ATP Challenger Tour and the 2018 WTA 125K series. It took place January 22 through 28, 2018 in Newport Beach, United States.

Men's singles main-draw entrants

=Seeds=

class="sortable wikitable"
width="70"| Country

! width="175"| Player

! Rank1

! Seed

{{flag|JPN}}

|Kei Nishikori

|24

|1

{{flagu|USA}}

|Frances Tiafoe

|81

|2

{{flagu|USA}}

|Taylor Fritz

|91

|3

{{flagu|USA}}

|Bjorn Fratangelo

|104

|4

{{flag|GBR}}

|Cameron Norrie

|111

|5

{{flag|KAZ}}

|Alexander Bublik

|112

|6

{{flagu|USA}}

|Ernesto Escobedo

|114

|7

{{flag|GER}}

|Yannick Hanfmann

|115

|8

  • 1 Rankings are as of 15 January 2018.

=Other entrants=

The following players received wildcards into the singles main draw:

The following players received entry from the qualifying draw:

Women's singles main-draw entrants

=Seeds=

class="sortable wikitable"
width="70"| Country

! width="175"| Player

! Rank1

! Seed

{{flagu|USA}}

|Christina McHale

|73

|1

{{flagu|USA}}

|Alison Riske

|84

|2

{{flagu|USA}}

|Taylor Townsend

|89

|3

{{flag|ITA}}

|Francesca Schiavone

|93

|4

{{flagu|USA}}

|Sofia Kenin

|102

|5

{{flagu|USA}}

|Sachia Vickery

|106

|6

{{flag|CRO}}

|Ajla Tomljanović

|107

|7

{{flag|COL}}

|Mariana Duque Mariño

|109

|8

  • 1 Rankings are as of 15 January 2018.

=Other entrants=

The following players received wildcards into the singles main draw:

The following players received entry from the qualifying draw:

=Withdrawals=

;Before the tournament

Women's doubles main-draw entrants

= Seeds =

class="sortable wikitable"
width="70"| Country

! width="175"| Player

! width="70"| Country

! width="175"| Player

! Rank1

! Seed

{{flag|COL}}

|Mariana Duque Mariño

|{{flag|ARG}}

|María Irigoyen

|183

|1

{{flagu|USA}}

|Desirae Krawczyk

|{{flag|MEX}}

|Giuliana Olmos

|242

|2

{{flagu|USA}}

|Kayla Day

|{{flagu|USA}}

|Caroline Dolehide

|247

|3

{{flagu|USA}}

|Taylor Townsend

|{{flag|BEL}}

|Yanina Wickmayer

|286

|4

Champions

=Men's singles=

{{main|2018 Oracle Challenger Series – Newport Beach – Men's singles}}

=Men's doubles=

{{main|2018 Oracle Challenger Series – Newport Beach – Men's doubles}}

=Women's singles=

{{main|2018 Oracle Challenger Series – Newport Beach – Women's singles}}

=Women's doubles=

{{main|2018 Oracle Challenger Series – Newport Beach – Women's doubles}}