Doubles
2003 Siebel Open
Final
Champions	Hyung-Taik Lee Vladimir Voltchkov
Runners-up	Paul Goldstein Robert Kendrick
Score	7–5, 4–6, 6–3
Details
Draw	16
Seeds	4
Events
Singles Doubles
← 2002 · Pacific Coast Championships · 2004 →

Wayne Black and Kevin Ullyett were the defending champions but only Black competed that year with Mark Philippoussis.

Black and Philippoussis lost in the quarterfinals to Davide Sanguinetti and Jim Thomas.

Hyung-Taik Lee and Vladimir Voltchkov won in the final 7–5, 4–6, 6–3 against Paul Goldstein and Robert Kendrick.

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

1. Bob Bryan / Mike Bryan (first round)
2. Chris Haggard / Brian MacPhie (first round)
3. Jan-Michael Gambill / Graydon Oliver (semifinals)
4. Mark Merklein / Thomas Shimada (first round)

	First round							Quarterfinals							Semifinals							Final
	1	B Bryan M Bryan	7	3	5
		H-T Lee V Voltchkov	5	6	7				H-T Lee V Voltchkov	6	6
	WC	P Amritraj S Amritraj	6	6				WC	P Amritraj S Amritraj	2	4
		J Balcells K Carlsen	1	4												H-T Lee V Voltchkov	6	77
	3	J-M Gambill G Oliver	6	6											3	J-M Gambill G Oliver	4	61
		J Gimelstob S Humphries	3	4				3	J-M Gambill G Oliver	6	77
		N Davydenko K Pless	5	1	r				J-L de Jager M Wakefield	3	64
		J-L de Jager M Wakefield	7	2																			Hyung-Taik Lee Vladimir Voltchkov	7	4	6
		J Blake T Martin	3	3																		WC	Paul Goldstein Robert Kendrick	5	6	3
		D Sanguinetti J Thomas	6	6					D Sanguinetti J Thomas	79	6
		W Black M Philippoussis	4	6	6				W Black M Philippoussis	67	4
	4	M Merklein T Shimada	6	3	4											D Sanguinetti J Thomas	3	4
		M Fish J Morrison	6	3	3										WC	P Goldstein R Kendrick	6	6
	WC	P Goldstein R Kendrick	4	6	6			WC	P Goldstein R Kendrick	6	4	6
		R Ginepri B Vahaly	2	6	6				R Ginepri B Vahaly	4	6	2
	2	C Haggard B MacPhie	6	4	4

• 2003 Siebel Open Doubles draw