Singles
1991 Tokyo Indoor
Champion	Stefan Edberg
Runner-up	Derrick Rostagno
Score	6–3, 1–6, 6–2
Draw	48
Seeds	16

Ivan Lendl was the defending champion, but lost in the semifinals this year.

Stefan Edberg won the title, defeating Derrick Rostagno in the final, 6–3, 1–6, 6–2.

Seeds

Draw

Finals

	Semifinals							Final
	1	Stefan Edberg	4	77	7
	6	Goran Ivanišević	6	62	5
								1	Stefan Edberg	6	1	6
								7	Derrick Rostagno	3	6	2
	3	Ivan Lendl	64	2
	7	Derrick Rostagno	77	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	S Edberg	6	6
		D Pate	6	6					D Pate	2	4
	Q	J Sobel	3	4											1	S Edberg	6	7
		G Muller	7	77											15	F Fontang	2	5
		S Doseděl	5	65					G Muller	63	4
								15	F Fontang	77	6
																						1	S Edberg	6	6
																						8	M Chang	2	2
								9	A Chesnokov	7	6
		P Canè	6	6					P Canè	5	3
	WC	H Tanizawa	3	4											9	A Chesnokov	3	4
		M Woodforde	6	6											8	M Chang	6	6
		P Lundgren	1	3					M Woodforde	1	4
								8	M Chang	6	6

Section 2

	First round							Second round							Third round							Quarterfinals
								4	A Agassi	7	6
		L Herrera	3	6	6				L Herrera	5	1
		D Marcelino	6	1	4										4	A Agassi	6	710
	Q	N Kroon	2	6	5											J Tarango	4	68
		J Tarango	6	1	7				J Tarango	77	6
								14	W Ferreira	65	4
																						4	A Agassi	3	4
																						6	G Ivanišević	6	6
								12	M Washington	6	77
		S Youl	77	6					S Youl	4	64
		T Högstedt	65	1											12	M Washington	68	77	4
		J Morgan	3	5											6	G Ivanišević	710	63	6
		D Poliakov	6	7					D Poliakov	4	2
								6	G Ivanišević	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								5	D Wheaton	77	3	6
	Q	B-S Kim	2	4					J Grabb	62	6	2
		J Grabb	6	6											5	D Wheaton	6	6
		A Olhovskiy	3	5												G Pozzi	0	2
		G Pozzi	6	7					G Pozzi	77	6
								11	T Woodbridge	60	3
																						5	D Wheaton	65	5
																						3	I Lendl	77	7
								13	W Masur	6	6
	Q	R Leach	2	4				Q	G Michibata	0	3
	Q	G Michibata	6	6											13	W Masur	4	77	2
		S Davis	77	77											3	I Lendl	6	65	6
		N Borwick	63	64					S Davis	2	3
								3	I Lendl	6	6

Section 4

	First round							Second round							Third round							Quarterfinals
								7	D Rostagno	3	6	6
		G Connell	5	3					J Stoltenberg	6	3	2
		J Stoltenberg	7	6											7	D Rostagno	3	6	6
	WC	R Tsujino	4	5											10	R Reneberg	6	3	4
		J Anderson	6	7					J Anderson	4	65
								10	R Reneberg	6	77
																						7	D Rostagno	77	4	6
																						2	B Becker	64	6	3
								16	S Matsuoka	2	6	77
		R Weiss	6	6					R Weiss	6	2	65
	WC	Y Yamamoto	2	3											16	S Matsuoka	6	3	4
	Q	D Orsanic	3	4											2	B Becker	2	6	6
		J Gunnarsson	6	6					J Gunnarsson	2	4
								2	B Becker	6	6

References

• Main Draw