Singles
2018 RBC Tennis Championships of Dallas
Final
Champion	Kei Nishikori
Runner-up	Mackenzie McDonald
Score	6–1, 6–4
Events
Singles Doubles
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Ryan Harrison was the defending champion but chose not to defend his title.

Kei Nishikori won the title after defeating Mackenzie McDonald 6–1, 6–4 in the final.

	Semifinals							Final
	1/WC	Kei Nishikori	6	6
		Jason Jung	4	4
								1/WC	Kei Nishikori	6	6
									Mackenzie McDonald	1	4
		Denis Kudla	4	4
		Mackenzie McDonald	6	6

	First round							Second round							Quarterfinals							Semifinals
	1/WC	K Nishikori	6	6
		D Novikov	3	3				1/WC	K Nishikori	4	6	6
		M Bachinger	2	6	6				M Bachinger	6	4	4
	Q	E Karlovskiy	6	3	4										1/WC	K Nishikori	77	6
	LL	Francesco Ferrari	78	2	2										LL	D Köpfer	63	3
	LL	D Köpfer	66	6	6			LL	D Köpfer	6	7
		G Oliveira	77	77					G Oliveira	0	5
	6	Y Hanfmann	63	65																		1/WC	K Nishikori	6	6
	4	B Fratangelo	4	6	4																		J Jung	4	4
		M Kecmanović	6	3	6				M Kecmanović	77	65	77
		A Krajicek	6	6					A Krajicek	64	77	64
		F Peliwo	3	3												M Kecmanović	1	1
		B Schnur	7	2	67											J Jung	6	6
	Q	Jared Hiltzik	5	6	79			Q	J Hiltzik	6	1	4
		J Jung	6	6					J Jung	4	6	6
	5	A Bublik	4	4

	First round							Second round							Quarterfinals							Semifinals
	8	T Paul	6	6
	Q	J Šátral	3	3				8	T Paul	66	4
		D Kudla	6	6					D Kudla	78	6
	WC	P Kypson	3	1												D Kudla	6	6
		B Klahn	6	2	6										3	T Fritz	3	3
		M Giron	4	6	4				B Klahn	4	6	62
	Q	Í Cervantes	2	7	1			3	T Fritz	6	2	77
	3	T Fritz	6	5	6																		D Kudla	4	4
	7	T Smyczek	6	4	6																		M McDonald	6	6
		M Krueger	1	6	3			7	T Smyczek	6	6
		A Pavić	6	66	69				A Collarini	4	4
		A Collarini	1	78	711										7	T Smyczek	4	2
		M McDonald	7	6												M McDonald	6	6
		T Ito	5	3					M McDonald	7	2	6
		S Kozlov	2	65				2/WC	F Tiafoe	5	6	3
	2/WC	F Tiafoe	6	77

• Main Draw
• Qualifying Draw