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Men's singles
1990 Canadian Open
Final
Champion	Michael Chang
Runner-up	Jay Berger
Score	4–6, 6–3, 7–6(7–3)
Details
Draw	56
Seeds	16
Events
Singles men women Doubles men women
← 1989 · Canadian Open · 1991 →

Michael Chang defeated Jay Berger in the final, 4–6, 6–3, 7–6^(7–3) to win the men's singles tennis title at the 1990 Canadian Open. With the win, Chang became the youngest Masters champion in history.

Ivan Lendl was the three-time reigning champion, but did not compete that year.

A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. The top eight seeds received a bye into the second round.

	Semifinals							Final
	7	Michael Chang	3	77	7
	5	Pete Sampras	6	65	5
								7	Michael Chang	4	6	77
								4	Jay Berger	6	3	63
	4	Jay Berger	3	6	6
		Jakob Hlasek	6	2	2

	First round							Second round							Third round							Quarterfinals
								1	A Agassi	6	6	6
		T Högstedt	4	2					M Stich	3	7	3
		M Stich	6	6											1	A Agassi	6	6
		P Lundgren	6	2												D Cahill	2	4
		B Pearce	7	6					B Pearce	4	4
		D Cahill	5	7	6				D Cahill	6	6
	15	A Volkov	7	5	3																	1	A Agassi	6	5	5
	9	D Wheaton	6	6																		7	M Chang	4	7	7
		M Washington	4	4				9	D Wheaton	6	6
		D Goldie	4	4				Q	E Velez	2	4
	Q	E Velez	6	6											9	D Wheaton	0	3
		J Tarango	2	2											7	M Chang	6	6
	Q	B Dyke	6	6				Q	B Dyke	2	3
								7	M Chang	6	6

	First round							Second round							Third round							Quarterfinals
								3	J McEnroe	7	6
		K Evernden	1	6	6				G Connell	6	1
		G Connell	6	4	7										3	J McEnroe	6	6
	WC	M Woodforde	6	3	0										13	A Mansdorf	2	4
		J Stoltenberg	4	6	6				J Stoltenberg	2	2
		B Shelton	6	6	1			13	A Mansdorf	6	6
	13	A Mansdorf	7	4	6																	3	J McEnroe	64	6	3
	12	K Curren	5	7	4																	5	P Sampras	77	4	6
		A Sznajder	7	6	6				A Sznajder	7	6
	Q	P Wekesa	6	6	6			Q	P Wekesa	6	3
	Q	G Pozzi	2	7	2											A Sznajder	6	3	2
	WC	M Wostenholme	4	6	6										5	P Sampras	4	6	6
		K Jones	6	2	4			WC	M Wostenholme	3	2
								5	P Sampras	6	6

	First round							Second round							Third round							Quarterfinals
								6	T Mayotte	6	6
	WC	B Gyetko	4	4				Q	C Garner	3	2
	Q	C Garner	6	6											6	T Mayotte	6	4	6
		P Chamberlin	6	7											11	R Reneberg	3	6	3
		J Rive	3	6					P Chamberlin	3	6	2
		G Bloom	6	2	1			11	R Reneberg	6	2	6
	11	R Reneberg	2	6	6																	6	T Mayotte	62	4
	14	J-P Fleurian	7	6																		4	J Berger	77	6
	WC	G Michibata	6	2				14	J-P Fleurian	2	2
	Q	B Derlin	6	0	1				D Rostagno	6	6
		D Rostagno	2	6	6											D Rostagno	6	4	1
		L Shiras	6	6											4	J Berger	4	6	6
		P Annacone	1	4					L Shiras	2	4
								4	J Berger	6	6

	First round							Second round							Third round							Quarterfinals
								8	P Korda	7	4	4
		S Davis	3	2					J Hlasek	5	6	6
		J Hlasek	6	6												J Hlasek	7	6
	Q	L Němeček	1	5												J Arias	5	1
		J Arias	6	7					J Arias	4
		U Riglewski	4	6				10	J Grabb	1r
	10	J Grabb	6	7																			J Hlasek	6	6
	16	M Kratzmann	3	6	6																		T Witsken	4	2
		S Youl	6	4	3			16	M Kratzmann	6	5	2
	WC	C Pridham	6	4					R Krishnan	2	7	6
		R Krishnan	7	6												R Krishnan	4	4
		M Šrejber	6	6	4											T Witsken	6	6
		T Witsken	3	7	6				T Witsken	7	4	6
								2	B Gilbert	5	6	2

• ATP main draw