The 1999 AT&T Challenge was a men's tennis tournament played on Clay in Atlanta, United States that was part of the World Series of the 1999 ATP Tour. It was the fourteenth edition of the tournament and was held from 26 April – 2 May 1999.

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

	Semifinals							Final[1]
		Jim Courier	63	3
	5	Sébastien Grosjean	7	6
									Stefan Koubek	6	6
								5	Sébastien Grosjean	1	2
		Stefan Koubek	5	6	6
	8	Magnus Larsson	7	4	1

	First round							Second round							Quarterfinals							Semifinals
		M Rodríguez	7	7
	1	P Rafter	65	65					M Rodríguez	7	6
		JA Marín	6	6					JA Marín	66	3
		L Horna	4	3												M Rodríguez	1	62
		J Courier	6	6												J Courier	6	7
		M Tillström	3	4					J Courier	6	7
		J Gimelstob	6	6					J Gimelstob	1	65
	7	J-M Gambill	0	4																			J Courier	63	3
		M Mirnyi	7	6																		5	S Grosjean	7	6
	3	V Spadea	5	3					M Mirnyi	6	4	1
		S Sargsian	6	6					S Sargsian	3	6	6
		C Woodruff	4	4												S Sargsian	4	65
		M Filippini	7	6											5	S Grosjean	6	7
		P Korda	5	1					M Filippini	4	2
	5	S Grosjean	66	7	6			5	S Grosjean	6	6
		C Mamiit	7	5	1

	First round							Second round							Quarterfinals							Semifinals
		G Cañas	6	6
	6	S Draper	4	3					G Cañas	63	64
		A Martín	6	4	7				A Martín	7	7
		I Labadze	2	6	64											A Martín	5	2
		S Koubek	6	7												S Koubek	7	6
		T Woodbridge	2	64					S Koubek	6	6
	4	M Chang	6	6				4	M Chang	1	4
		G Pozzi	4	2																			S Koubek	5	6	6
	8	M Larsson	6	6																		8	M Larsson	7	4	1
		J Van Herck	3	2				8	M Larsson	7	2	6
		G Blanco	6	7					G Blanco	66	6	1
		M Norman	4	63											8	M Larsson	6	6
		M Woodforde	2	6	6										2	J Stoltenberg	2	2
		L Hewitt	6	3	4				M Woodforde	2	3
	2	J Stoltenberg	6	6				2	J Stoltenberg	6	6
		P Goldstein	4	1

• Main draw