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
Final
Champion	Kei Nishikori
Runner-up	Feliciano López
Score	6–2, 6–3
Details
Draw	32
Seeds	8
Events
Singles men women Doubles men women
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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
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Semifinals							Final
	5	Kei Nishikori	6	0
		Marinko Matosevic	4	0^r
								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	7^7	3	7^9
		J Melzer	4	6^3					I Sijsling	6^2	6	6^7
		I Sijsling	6	7^7											1	M Čilić	4	2
	Q	D Young	5												5	K Nishikori	6	6
		X Malisse	1^r					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	0^r
		A Falla	3	3				4	S Querrey	6	4	5
		G Soeda	6^6	4					M Matosevic	3	6	7
		M Matosevic	7^8	6												M Matosevic	6^6	6	6
	WC	S Johnson	6^4	4											7	A Dolgopolov	7^8	2	4
	Q	R Williams	7^7	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	7^7	6^2				Ł Kubot	2	4
		Ł Kubot	6	6^4	7^7										LL	M Russell	4	6^5
		Y-h Lu	6	6^3	4											D Istomin	6	7^7
		L Hewitt	2	7^7	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	7^8	6																			F López	6	3	6
		E Donskoy	6^6	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	6^7
									Donald Young	4	6	7^9
		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	7^7	6
									Daniel Muñoz de la Nava	6^4	4
		Daniel Muñoz de la Nava	6	7^7
	6	Vasek Pospisil	4	6^3

Third qualifier

	First round							Qualifying competition
	3	Philipp Petzschner	1	6^6
		Ivo Karlović	6	7^8
									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	6^4	6	6^4
	7	Illya Marchenko	7^7	2	7^7

References

• Main Draw
• Qualifying Draw