Singles
1998 U.S. Pro Tennis Championships
Final
Champions	Michael Chang[1]
Runners-up	Paul Haarhuis
Score	6–3, 6–4
Details
Draw	32
Seeds	8
Events
Singles Doubles
← 1997 · U.S. Pro Tennis Championships · 1999 →

The 1998 U.S. Pro Tennis Championships was a men's tennis tournament played on Hard courts in Boston, United States that was part of the International Series of the 1998 ATP Tour. It was the seventieth edition of the tournament and was held from 24 to 30 August 1998.

Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.

	Semifinals							Final[1]
		Sébastien Grosjean	5	6	6
	4	Michael Chang	7	4	3
								4	Michael Chang	6	6
									Paul Haarhuis	3	4
	3	Cédric Pioline	5	6	3
		Paul Haarhuis	7	4	6

	First round							Second round							Quarterfinals							Semifinals
	1	J Björkman	6	6
		A Clément	2	3				1	J Björkman	6	7
		G Blanco	3	6	6				G Blanco	2	65
		H Gumy	6	1	4										1	J Björkman	67	1
		S Grosjean	6	6												S Grosjean	7	6
		J van Lottum	2	0					S Grosjean	6	7
		X Malisse	6	6					X Malisse	4	5
		S Campbell	3	1																			S Grosjean	5	6	6
	4	M Chang	7	6																		4	M Chang	7	4	3
		A Pavel	5	2				4	M Chang	4	6	6
		K Carlsen	3	6	6				K Carlsen	6	3	4
		J Golmard	6	3	4										4	M Chang	6	2	6
		L Roux	6	6												G Pozzi	4	6	1
		R Delgado	4	2					L Roux	7	2	63
		G Pozzi	6	6					G Pozzi	5	6	7
	6	F Santoro	2	2

	First round							Second round							Quarterfinals							Semifinals
	5	T Muster	6	6
		M Filippini	0	2				5	T Muster	6	6
		N Lapentti	68	6	7				N Lapentti	2	4
		C Costa	7	4	5										5	T Muster	5	3
		A Ilie	6	6											3	C Pioline	7	6
		F Squillari	4	2					A Ilie	4	2
	3	C Pioline	6	6				3	C Pioline	6	6
		A Voinea	4	0																		3	C Pioline	5	6	3
		J Novák	4	6	6																		P Haarhuis	7	4	6
	7	A Gaudenzi	6	1	1				J Novák	1	6	5
		P Haarhuis	6	6					P Haarhuis	6	4	7
		L Arnold	1	3												P Haarhuis	0	6	6
		S Schalken	7	7												S Schalken	6	4	3
		D Sanguinetti	63	63					S Schalken	6	6
		J Tarango	6	6					J Tarango	1	1
	2	K Kučera	2	3