Doubles
1998 Sybase Open
Final
Champions	Mark Woodforde Todd Woodbridge
Runners-up	Nelson Aerts André Sá
Score	6–1, 7–5
Details
Draw	16
Seeds	4
Events
Singles Doubles
← 1997 · Pacific Coast Championships · 1999 →

The 1998 Sybase Open was a men's tennis tournament played on indoor hard courts at the San Jose Arena in San Jose, California in the United States and was part of the ATP World Series of the 1998 ATP Tour. It was the 109th edition of the tournament ran from February 9 through February 15, 1998.

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

	First round							Quarterfinals							Semifinals							Final[1]
	1	T Woodbridge M Woodforde	6	6
		B Coupe P Rosner	3	4				1	T Woodbridge M Woodforde	6	7
		G Stafford J Waite	1	6	7				G Stafford J Waite	4	5
		S Sargsian G Van Emburgh	6	4	6										1	T Woodbridge M Woodforde	7	7
	4	W Black J Salzenstein	6	6											4	W Black J Salzenstein	5	6
		J Palmer J Stark	3	4				4	W Black J Salzenstein	W/O
		J Gimelstob B MacPhie	6	7					J Gimelstob B MacPhie
		T Haas M Philippoussis	2	6																		1	T Woodbridge M Woodforde	6	7
		N Aerts A Sá	6	6	6																		N Aerts A Sá	1	5
		B Bryan M Bryan	7	3	4				N Aerts A Sá	7	3	7
	3	D Macpherson R Reneberg	6	6				3	D Macpherson R Reneberg	6	6	6
		J Burillo A Martín	1	3												N Aerts A Sá	6	7
		S Davis A O'Brien	6	6												D DiLucia M Sell	2	6
		D Bowen Ó Ortiz	3	4					S Davis A O'Brien	5	4
		D DiLucia M Sell	4	6	7				D DiLucia M Sell	7	6
	2	G Kuerten F Meligeni	6	1	5