2013 U.S. National Indoor Tennis Championships – Men's singles

Jürgen Melzer was the defending champion, but lost in the first round to Igor Sijsling.
Kei Nishikori won the title, defeating Feliciano López in the final, 6–2, 6–3.

Men's singles
2013 U.S. National Indoor Tennis Championships
Champion	Kei Nishikori
Runner-up	Feliciano López
Score	6–2, 6–3
Draw	32
Seeds	8

Main article: 2013 U.S. National Indoor Tennis Championships

Seeds

1. Marin Čilić (quarterfinals)
2. Milos Raonic (first round)
3. John Isner (first round)
4. Sam Querrey (second round)
5. Kei Nishikori (champion)
6. Tommy Haas (second round, withdrew because of a viral illness)
7. Alexandr Dolgopolov (quarterfinals)
8. Fernando Verdasco (withdrew because of a neck injury)

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
	5	Kei Nishikori	6	0
		Marinko Matosevic	4	0r
								5	Kei Nishikori	6	6
									Feliciano López	2	3
		Denis Istomin	2	6	3
		Feliciano López	6	3	6

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	M Čilić	4	6	6
		I Dodig	6	2	3			1	M Čilić	77	3	79
		J Melzer	4	63					I Sijsling	62	6	67
		I Sijsling	6	77											1	M Čilić	4	2
	Q	D Young	5												5	K Nishikori	6	6
		X Malisse	1r					Q	D Young	3	3
	Q	I Marchenko	4	5				5	K Nishikori	6	6
	5	K Nishikori	6	7																		5	K Nishikori	6	0
	4	S Querrey	6	6																			M Matosevic	4	0r
		A Falla	3	3				4	S Querrey	6	4	5
		G Soeda	66	4					M Matosevic	3	6	7
		M Matosevic	78	6												M Matosevic	66	6	6
	WC	S Johnson	64	4											7	A Dolgopolov	78	2	4
	Q	R Williams	77	6				Q	R Williams	4	6	4
		B Phau	3	4				7	A Dolgopolov	6	4	6
	7	A Dolgopolov	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	Q	A Bogomolov Jr.	2	4
	LL	M Russell	6	6				LL	M Russell	6	6
		R Harrison	4	77	62				Ł Kubot	2	4
		Ł Kubot	6	64	77										LL	M Russell	4	65
		Y-h Lu	6	63	4											D Istomin	6	77
		L Hewitt	2	77	6				L Hewitt	1	2
		D Istomin	6	6					D Istomin	6	6
	3	J Isner	4	3																			D Istomin	2	6	3
	6	T Haas	78	6																			F López	6	3	6
		E Donskoy	66	4				6	T Haas
		B Becker	6	3	4				F López	w/o
		F López	4	6	6											F López	6	6
		F Mayer	6	3	2										WC	J Sock	4	3
	WC	J Blake	4	6	6			WC	J Blake	5	4
	WC	J Sock	6	5	7			WC	J Sock	7	6
	2	M Raonic	3	7	5

Qualifying

Seeds

1. Michael Russell (qualifying competition, lucky loser)
2. Tim Smyczek (first round)
3. Philipp Petzschner (first round)
4. Matthew Ebden (qualifying competition)
5. Alex Bogomolov Jr. (qualified)
6. Vasek Pospisil (first round)
7. Illya Marchenko (qualified)
8. Denis Kudla (first round)

Qualifiers

1. Donald Young
2. Rhyne Williams
3. Alex Bogomolov Jr.
4. Illya Marchenko

Lucky losers

1. Michael Russell

Draw

First qualifier

	First round							Qualifying competition
	1	Michael Russell	7	6
	WC	Christian Harrison	5	4
								1	Michael Russell	6	3	67
									Donald Young	4	6	79
		Donald Young	6	6
	8	Denis Kudla	2	1

Second qualifier

	First round							Qualifying competition
	2	Tim Smyczek	6	1	2
		Rhyne Williams	2	6	6
									Rhyne Williams	77	6
									Daniel Muñoz de la Nava	64	4
		Daniel Muñoz de la Nava	6	77
	6	Vasek Pospisil	4	63

Third qualifier

	First round							Qualifying competition
	3	Philipp Petzschner	1	66
		Ivo Karlović	6	78
									Ivo Karlović	3	6	4
								5	Alex Bogomolov Jr.	6	3	6
		Sekou Bangoura	5	1
	5	Alex Bogomolov Jr.	7	6

Fourth qualifier

	First round							Qualifying competition
	4	Matthew Ebden	6	6
	WC	Connor Glennon	3	4
								4	Matthew Ebden	6	3	1
								7	Illya Marchenko	4	6	6
		Andrey Golubev	64	6	64
	7	Illya Marchenko	77	2	77

References

• Main Draw
• Qualifying Draw