1991 U.S. Pro Indoor – Singles

Ivan Lendl won the title, defeating Sampras, 5–7, 6–4, 6–4, 3–6, 6–3 in the final.

Singles
1991 U.S. Pro Indoor
Champion	Ivan Lendl
Runner-up	Pete Sampras
Final score	5–7, 6–4, 6–4, 3–6, 6–3
Seeds	16

Main article: 1991 U.S. Pro Indoor

Pete Sampras was the defending champion.

Seeds

1. Ivan Lendl (Champion)
2. Pete Sampras (Final)
3. Brad Gilbert (Semifinals)
4. John McEnroe (Semifinals)
5. Jay Berger (Second Round)
6. Jim Courier (Second Round)
7. Michael Stich (Quarterfinals)
8. Tim Mayotte (Second Round)
9. Petr Korda (Quarterfinals)
10. Derrick Rostagno (Second Round)
11. Darren Cahill (Third Round)
12. Mark Koevermans (Second Round)
13. Wally Masur (Third Round)
14. Paul Haarhuis (Third Round)
15. Gary Muller (Third Round)
16. Patrick McEnroe (Second Round)

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

Finals

	Semifinals							Final
	1	Ivan Lendl	6	3	6
	3	Brad Gilbert	4	6	4
								1	Ivan Lendl	5	6	6	3	6
								2	Pete Sampras	7	4	4	6	3
	4/WC	John McEnroe	2	4
	2	Pete Sampras	6	6

Top Half

Section 1

	First Round							Second Round							Third Round							Quarterfinals
								1	I Lendl	6	7
	Q	D Goldie	4	6^7					G Raoux	1	5
		G Raoux	6	7^9											1	I Lendl	7^7	6
		R Furlan	4	7	6										15	G Muller	6^5	3
		V Paloheimo	6	5	4				R Furlan	7^7	3	4
								15	G Muller	6^5	6	6
																						1	I Lendl	6	7^9
																						7	M Stich	2	6^7
								10	D Rostagno	5	3
	Q	G Stafford	2	2				Q	C Adams	7	6
	Q	C Adams	6	6											Q	C Adams	4	4
	Q	J Tarango	5	4											7	M Stich	6	6
	WC	C Caratti	7	6				WC	C Caratti	2	4
								7	M Stich	6	6

Section 2

	First Round							Second Round							Third Round							Quarterfinals
								3	B Gilbert	6	6
		T Carbonell	6	6					T Carbonell	3	3
	WC	G Bloom	1	1											3	B Gilbert	7^7	6
		U Riglewski	6	6^3	6										14	P Haarhuis	6^3	1
	Q	G Layendecker	3	7^7	0				U Riglewski	1	3
								14	P Haarhuis	6	6
																						3	B Gilbert	4	6	6
																							K Curren	6	3	0
								11	D Cahill	6	6
		T Högstedt	6	6					T Högstedt	4	2
		R Krishnan	3	1											11	D Cahill	7^9	3	6^2
		M Kratzmann	3	7^7	4											K Curren	6^7	6	7^7
		K Curren	6	6^4	6				K Curren	6	6
								5	J Berger	1	2

Bottom Half

Section 3

	First Round							Second Round							Third Round							Quarterfinals
								6	J Courier	2	4
		J Grabb	6	6					J Grabb	6	6
		P Kühnen	4	4												J Grabb	7^7	1	3
		A Rahunen	7^13	7												A Rahunen	6^3	6	6
		G Connell	6^11	5					A Rahunen	6	6
								12	M Koevermans	1	2
																							A Rahunen	5	3
																						4/WC	J McEnroe	7	6
								13	W Masur	4	7^7	7^7
		C van Rensburg	6	6					C van Rensburg	6	6^1	6^5
		B Pearce	2	1											13	W Masur	6^2	4
		A Mronz	6	6											4/WC	J McEnroe	7^7	6
		H de la Peña	2	2					A Mronz	1	2
								4/WC	J McEnroe	6	6

Section 4

	First Round							Second Round							Third Round							Quarterfinals
								8	T Mayotte	4	2
		J-P Fleurian	5	4				Q	W Ferreira	6	6
	Q	W Ferreira	7	6											Q	W Ferreira	5	6^3
		J Yzaga	6	6											9	P Korda	7	7^7
		A Järryd	3	3					J Yzaga	4	3
								9	P Korda	6	6
																						9	P Korda	4	0
																						2	P Sampras	6	6
								16/WC	P McEnroe	0	3
		A Antonitsch	6^1	6	0				M Washington	6	6
		M Washington	7^7	4	6											M Washington	3	6^7
		M Šrejber	6	6^2	6										2	P Sampras	6	7^9
		S Davis	4	7^7	3				M Šrejber	2	5
								2	P Sampras	6	7

References

• Main Draw