Singles
1990 Nichirei International Championships
Final
Champion	Mary Joe Fernández
Runner-up	Amy Frazier
Score	3–6, 6–2, 6–3
Details
Draw	28
Seeds	8
Events
Singles Doubles
Nichirei International Championships · 1991 →

In the inaugural edition of the tournament, Mary Joe Fernández won the title by defeating 18-year-old Amy Frazier 3–6, 6–2, 6–3 in the final.^[1][2]

The first four seeds received a bye into the second round.

	Semifinals							Final
	5	Manuela Maleeva-Fragnière	6	5	4
	4	Mary Joe Fernández	4	7	6
								4	Mary Joe Fernández	3	6	6
								8	Amy Frazier	6	2	3
	3	Katerina Maleeva	5	4
	8	Amy Frazier	7	6

	First round							Second round							Quarterfinals							Semifinals
								1	M Navratilova	6	6
		S Rehe	4	6	6				S Rehe	1	3
		R White	6	0	1										1	M Navratilova	5	6	3
		P Louie Harper	6	6											5	M Maleeva-Fragnière	7	4	6
		C MacGregor	3	2					P Louie Harper	2	2
		T Takagi	0	2				5	M Maleeva-Fragnière	6	6
	5	M Maleeva-Fragnière	6	6																		5	M Maleeva-Fragnière	6	5	4
																						4	MJ Fernández	4	7	6
								4	MJ Fernández	6	6
		C Tessi	6	6					C Tessi	3	1
		M Javer	3	2											4	MJ Fernández	6	6
		M Werdel	6	6											7	H Suková	3	4
		P Vásquez	4	2					M Werdel	77	3	2
		A Leand	2	2				7	H Suková	64	6	6
	7	H Suková	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	J Capriati	6	77
		M Miyauchi	4	61				6	J Capriati	6	6
		M Maleeva	6	6					M Maleeva	2	4
		K Okamoto	3	4											6	J Capriati	64	6	63
		G Fernández	6	6											3	K Maleeva	77	3	77
		M Kidowaki	0	2					G Fernández	78	2	2
								3	K Maleeva	66	6	6
																						3	K Maleeva	5	4
	8	A Frazier	77	6																		8	A Frazier	7	6
		B Schultz	64	1				8	A Frazier	6	7
		J Richardson	5	3					E Švíglerová	2	5
		E Švíglerová	7	6											8	A Frazier	5	7	6
		E Pfaff	6	6											2	M Seles	7	5	2
		M Jaggard	3	4					E Pfaff	1	0
								2	M Seles	6	6

• Official results archive (ITF)
• Official results archive (WTA)