2018 Oracle Challenger Series – Chicago

The 2018 Oracle Challenger Series – Chicago was a professional tennis tournament played on outdoor hard courts. This tournament was part of the 2018 ATP Challenger Tour and the 2018 WTA 125K series. The first edition took place from September 4 to 9, 2018 in Chicago, United States.

2018 Oracle Challenger Series – Chicago
Date	September 4–9
Edition	1st
Category	ATP Challenger Tour WTA 125K series
Draw	32S / 16D
Prize money	$150,000+H (ATP) $150,000 (WTA)
Surface	Hard, outdoor
Location	Chicago, United States
Venue	XS Tennis Village
Champions
Men's singles
Denis Istomin
Women's singles
Petra Martić
Men's doubles
Luke Bambridge / Neal Skupski
Women's doubles
Mona Barthel / Kristýna Plíšková

Men's singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
ITA	Andreas Seppi	51	1
UZB	Denis Istomin	76	2
CAN	Vasek Pospisil	88	3
SRB	Viktor Troicki	102	4
USA	Michael Mmoh	120	5
BEL	Ruben Bemelmans	128	6
SWE	Elias Ymer	132	7
USA	Noah Rubin	135	8

• ¹ Rankings are as of 27 August 2018.

Other entrants

The following players received wildcards into the singles main draw:

• JC Aragone
• Thai-Son Kwiatkowski
• Tommy Paul
• Andreas Seppi

The following players received entry into the singles main draw as alternates:

• Roberto Cid Subervi
• Ernesto Escobedo
• Dominik Köpfer
• Donald Young

The following players received entry from the qualifying draw:

• Sekou Bangoura
• Vincent Millot
• Hugo Nys
• Alexander Sarkissian

The following players received entry as lucky losers:

• Ruan Roelofse
• Kaichi Uchida

Women's singles main-draw entrants

Seeds

Country	Player	Rank1	Seed
USA	Danielle Collins	37	1
CRO	Petra Martić	47	2
KAZ	Zarina Diyas	60	3
GER	Tatjana Maria	70	4
FRA	Pauline Parmentier	71	5
USA	Sachia Vickery	78	6
RUS	Evgeniya Rodina	80	7
SWE	Johanna Larsson	82	8

• ¹ Rankings are as of 27 August 2018.^[1]

Other entrants

The following players received wildcards into the singles main draw:

• Danielle Collins
• Lauren Davis
• Francesca Di Lorenzo
• Allie Kiick
• Varvara Lepchenko

The following players received entry from the qualifying draw:

• Françoise Abanda
• Kristie Ahn
• Robin Anderson
• Irina Falconi
• Sesil Karatantcheva
• Jamie Loeb

Withdrawals

• Jennifer Brady → replaced by Duan Yingying
• Dalila Jakupović → replaced by Beatriz Haddad Maia
• Vania King → replaced by Zhu Lin
• Magda Linette → replaced by Madison Brengle
• Christina McHale → replaced by Jana Fett
• Monica Niculescu → replaced by Katie Boulter
• Rebecca Peterson → replaced by Mona Barthel
• Monica Puig → replaced by Ons Jabeur

Women's doubles main-draw entrants

Seeds

Country	Player	Country	Player	Rank1	Seed
USA	Kaitlyn Christian	USA	Sabrina Santamaria	108	1
CRO	Darija Jurak	SUI	Xenia Knoll	128	2
CHI	Alexa Guarachi	USA	Desirae Krawczyk	154	3
RUS	Natela Dzalamidze	RUS	Veronika Kudermetova	182	4

• Rankings are as of 27 August 2018

Champions

Men's singles

Main article: 2018 Oracle Challenger Series – Chicago – Men's singles

• Denis Istomin def. Reilly Opelka 6–4, 6–2.

Women's singles

Main article: 2018 Oracle Challenger Series – Chicago – Women's singles

• Petra Martić def. Mona Barthel, 6–4, 6–1

Men's doubles

Main article: 2018 Oracle Challenger Series – Chicago – Men's doubles

• Luke Bambridge / Neal Skupski def. Leander Paes / Miguel Ángel Reyes-Varela, 6–3, 6–4

Women's doubles

Main article: 2018 Oracle Challenger Series – Chicago – Women's doubles

• Mona Barthel / Kristýna Plíšková def. Asia Muhammad / Maria Sanchez, 6–3, 6–2