Singles
1990 Diet Pepsi Championships
Final
Champion	Jakob Hlasek
Runner-up	Michael Chang
Score	7–6, 6–3
Details
Draw	16
Seeds	8
Events
Singles Doubles
← 1989 · Diet Pepsi Championships

The 1990 Diet Pepsi Championships was a tennis tournament played on indoor carpet courts at the Wembley Arena in Wembley, London in the United Kingdom. Michael Chang was the defending champion, but he lost the final to Jakob Hlasek, 7–6, 6–3.^[1]

	Semifinals							Final
		C Bergström	3	6	6
	3	M Chang	6	3	7
								3	M Chang	6	3
								7	J Hlasek	7	6
	Q	D Nargiso	6	2
	7	J Hlasek	7	6

	First round							Second round							Quarterfinals							Semifinals
	1	P Sampras	6	4	6
	LL	C Pioline	2	6	3			1	P Sampras
	LL	E Masso	4	4					C Bergström	w/o
		C Bergström	6	6												C Bergström	6	6
	Q	P McEnroe	6	7											Q	P McEnroe	2	4
		J Grabb	2	5				Q	P McEnroe	7	3	6
		A Antonitsch	3	6	4				S Davis	5	6	4
	8	S Davis	6	4	6																		C Bergström	3	6	6
	3	M Chang	6	6																		3	M Chang	6	3	7
		M Kratzmann	0	0				3	M Chang	6	6
	WC	J Bates	7	7				WC	J Bates	3	3
		R Krishnan	6	6											3	M Chang	3	6	6
		P Lundgren	6	6	6											P Lundgren	6	3	4
		N Pereira	7	3	4				P Lundgren	7	6
	Q	R Leach	2	4				5	A Krickstein	5	4
	5	A Krickstein	6	6

	First round							Second round							Quarterfinals							Semifinals
	6	H Skoff	6	4	2
		P Baur	3	6	6				P Baur	6	6	6
	Q	D Nargiso	6	6				Q	D Nargiso	3	7	7
		A Rahunen	2	4											Q	D Nargiso	6	3	6
		D Cahill	7	6												M Larsson	3	6	3
	WC	P Cash	6	4					D Cahill	6	6	6
		M Larsson	6	7					M Larsson	7	3	7
	4	G Forget	2	6																		Q	D Nargiso	6	2
	7	J Hlasek	6	6	6																	7	J Hlasek	7	6
		T Woodbridge	1	7	3			7	J Hlasek	7	7
		G Prpić	4	4					G Muller	5	5
		G Muller	6	6											7	J Hlasek	4
		N Kulti	6	6											2	G Ivanišević	1	r
	Q	M Woodforde	2	1					N Kulti	6	4
		T Champion	4	2				2	G Ivanišević	7	6
	2	G Ivanišević	6	6

• ITF tournament edition details