2018 Oracle Challenger Series – Chicago – Men's singles

This was the first edition of the tournament.

Chicago – Men's singles
2018 Oracle Challenger Series – Chicago
Champion	Denis Istomin
Runner-up	Reilly Opelka
Score	6–4, 6–2

Main article: 2018 Oracle Challenger Series – Chicago

Denis Istomin won the title after defeating Reilly Opelka 6–4, 6–2 in the final.

Seeds

1. Andreas Seppi (first round)
2. Denis Istomin (champion)
3. Vasek Pospisil (first round)
4. Viktor Troicki (first round)
5. Michael Mmoh (second round)
6. Ruben Bemelmans (quarterfinals)
7. Elias Ymer (first round)
8. Noah Rubin (quarterfinals)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Semifinals							Final
	Alt	Dominik Köpfer	3	63
		Reilly Opelka	6	77
									Reilly Opelka	4	2
								2	Denis Istomin	6	6
		Bjorn Fratangelo	1	2
	2	Denis Istomin	6	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1/WC	A Seppi	3	65
	Q	A Sarkissian	6	77				Q	A Sarkissian	6	64	63
		DE Galán	65	3					JC Aragone	2	77	77
		JC Aragone	77	6												JC Aragone	4	2
	Alt	D Köpfer	6	6											Alt	D Köpfer	6	6
	Q	V Millot	3	4				Alt	D Köpfer	4	77	6
		M Krueger	3	6	6				M Krueger	6	64	2
	7	E Ymer	6	3	2																	Alt	D Köpfer	3	63
	3	V Pospisil	2	2																			R Opelka	6	77
	Alt	D Young	6	6				Alt	D Young	6	6
		J-P Smith	2	6	6				J-P Smith	3	4
	Alt	R Cid Subervi	6	1	4										Alt	D Young	6	2	65
		R Quiroz	3	2												R Opelka	3	6	77
		R Opelka	6	6					R Opelka	6	6
		C Eubanks	7	4	4			5	M Mmoh	4	4
	5	M Mmoh	5	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	N Rubin	6	3	6
		E King	4	6	3			8	N Rubin	5	6	7
		A Popyrin	6	7					A Popyrin	7	2	5
		V Estrella Burgos	3	5											8	N Rubin	1	4
	Alt	E Escobedo	63	6	1											B Fratangelo	6	6
	Q	S Bangoura	77	4	6			Q	S Bangoura	4	6	5
		B Fratangelo	2	6	6				B Fratangelo	6	1	7
	4	V Troicki	6	2	0																		B Fratangelo	1	2
	6	R Bemelmans	7	78																		2	D Istomin	6	6
	Q	H Nys	5	66				6	R Bemelmans	6	6
	LL	K Uchida	6	6				LL	K Uchida	3	4
	WC	T-S Kwiatkowski	1	3											6	R Bemelmans	3	4
	WC	T Paul	6	6											2	D Istomin	6	6
	LL	R Roelofse	3	2				WC	T Paul	5	3
		M Arévalo	4	1				2	D Istomin	7	6
	2	D Istomin	6	6

External links

• Main Draw
• Qualifying Draw