1998 U.S. Pro Tennis Championships – Singles

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.

Singles
1998 U.S. Pro Tennis Championships
Champions	Michael Chang
Runners-up	Paul Haarhuis
Score	6–3, 6–4
Draw	32
Seeds	8

Seeds

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

1. Jonas Björkman (quarterfinals)
2. Karol Kučera (first round)
3. Cédric Pioline (semifinals)
4. Michael Chang (champion)
5. Thomas Muster (first round)
6. Fabrice Santoro (first round)
7. Andrea Gaudenzi (first round)
8. Unknown (withdrew)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• SE = Special exempt
• PR = Protected ranking
• ITF = ITF entry
• JE = Junior exempt
• w/o = Walkover
• r = Retired
• d = Defaulted
• SR = Special ranking

Finals

	Semifinals							Final
		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

Top half

	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

Bottom half

	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