Singles
1998 Grand Prix de Tennis de Toulouse
Final
Champion	Jan Siemerink[1]
Runner-up	Greg Rusedski
Score	6–4, 6–4
Details
Draw	32 (2WC/4Q/2LL)
Seeds	8
Events
Singles Doubles
← 1997 · Grand Prix de Tennis de Toulouse · 1999 →

The 1998 Grand Prix de Tennis de Toulouse was a men's tennis tournament played on indoor hard in Toulouse, France that was part of the International Series of the 1998 ATP Tour. It was the seventeenth edition of the tournament and was held from 28 September – 4 October.

Nicolas Kiefer was the defending champion, but lost in the semifinals to Greg Rusedski.

Jan Siemerink won the title by defeating Greg Rusedski 6–4, 6–4 in the final.^[2][3]

This tournament was notable for being where future 20-time Grand Slam champion and world No. 1 Roger Federer recorded his first match win.

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

	Semifinals							Final[1]
	1	Greg Rusedski	6	6
	4	Nicolas Kiefer	4	1
								1	Greg Rusedski	4	4
								2	Jan Siemerink	6	6
	3	Thomas Johansson	3	6	5
	2	Jan Siemerink	6	3	7

	First round							Second round							Quarterfinals							Semifinals
	1	G Rusedski	7	7
		M-K Goellner	65	63				1	G Rusedski	6	6
		A Medvedev	6	65	6				A Medvedev	4	3
	WC	J-P Perlant	4	7	4										1	G Rusedski	6	6
		A Clément	7	3	6											A Clément	4	1
		S Grosjean	64	6	4				A Clément	6	4	7
	LL	M Sinner	6	6				LL	M Sinner	3	6	61
		P Haarhuis	2	4																		1	G Rusedski	6	6
	4	N Kiefer	6	6																		4	N Kiefer	4	1
	Q	J Boutter	1	2				4	N Kiefer	4	6	6
	Q	L Barthez	7	6				Q	L Barthez	6	3	1
		C Vinck	67	2											4	N Kiefer	6	3	6
		J Tarango	4	6	6											M Rosset	3	6	1
	LL	I Heuberger	6	1	4				J Tarango	3	4
		M Rosset	4	6	6				M Rosset	6	6
	5	F Santoro	6	2	3

	First round							Second round							Quarterfinals							Semifinals
	Q	S Huet	7	7
	6	M Larsson	5	5				Q	S Huet	7	65	6
		S Sargsian	6	7					S Sargsian	5	7	3
		L Roux	3	65											Q	S Huet	6	4	5
		D Vacek	7	6											3	T Johansson	3	6	7
		G Pozzi	62	4					D Vacek	4	3
	3	T Johansson	7	7				3	T Johansson	6	6
	WC	A Di Pasquale	66	5																		3	T Johansson	3	6	5
	7	R Fromberg	6	6																		2	J Siemerink	6	3	7
		D Sanguinetti	4	4				7	R Fromberg	1	65
	Q	R Federer	6	6				Q	R Federer	6	7
		G Raoux	2	2											Q	R Federer	65	2
		J Golmard	6	7											2	J Siemerink	7	6
		D Prinosil	4	64					J Golmard	6	3	4
	2	J Siemerink	6	6				2	J Siemerink	3	6	6
		G Cañas	3	4

All seeds receive a bye into the second round.

	First round							Second round							Qualifying competition
								1	Martin Sinner	6	6
									Sébastien de Chaunac	4	4
		Sébastien de Chaunac	4	6	6
	WC	Mathieu Cordelier	6	3	2
															1	Martin Sinner	3	6	4
															8	Julien Boutter	6	3	6
		José María Arnedo	2	3
		Guillaume Marx	6	6
									Guillaume Marx	6	6
								8	Julien Boutter	7	7

	First round							Second round							Qualifying competition
								2	Ivo Heuberger	4	6	7
									David Adams	6	1	6
		Aleksandar Kitinov	2	3
		David Adams	6	6
															2	Ivo Heuberger	0	6	2
																Stéphane Huet	6	0	6
		Stéphane Huet	6	6
		Vincent Lavergne	2	4
									Stéphane Huet	7	6
								7	Régis Lavergne	5	2

	First round							Second round							Qualifying competition
								3	Alex Rădulescu	6	6
									Roger Federer	7	7
		Marcello Wowk	6	2
		Roger Federer	7	6
																Roger Federer	6	6
															6	Olivier Delaître	4	4
		Jérôme Hanquez	6	7
		Gregory Zavialoff	4	6
									Jérôme Hanquez	0	1
								6	Olivier Delaître	6	6

	First round							Second round							Qualifying competition
								4	Petr Luxa	6	6
								WC	Romain Ambert	4	2
		Aleksander Mierzwiński	6	2
	WC	Romain Ambert	7	6
															4	Petr Luxa	6	4	1
																Lionel Barthez	3	6	6
		Lionel Barthez	6	7
		Peter Nyborg	3	6
									Lionel Barthez	6	7
								5	Nenad Zimonjić	2	5

• Official results archive (ATP)
• Official results archive (ITF)