2003 AIG Japan Open Tennis Championships – Men's singles

Kenneth Carlsen was the defending champion but lost in the third round to Hyung-Taik Lee.

Men's singles
2003 AIG Japan Open Tennis Championships
Champion	Rainer Schüttler
Runner-up	Sébastien Grosjean
Score	7–6(7–5), 6–2
Draw	48 (6 Q / 4 WC )
Seeds	16

Rainer Schüttler won in the final 7–6^(7–5), 6–2 against Sébastien Grosjean.

Seeds

All sixteen seeds received a bye to the second round.

1. Rainer Schüttler (champion)
2. Sébastien Grosjean (final)
3. Paradorn Srichaphan (semifinals)
4. Jiří Novák (third round)
5. Mark Philippoussis (quarterfinals)
6. Nicolas Kiefer (third round)
7. Hyung-Taik Lee (quarterfinals)
8. Jan-Michael Gambill (quarterfinals)
9. Kenneth Carlsen (third round)
10. Mario Ančić (third round)
11. n/a
12. John van Lottum (second round)
13. Brian Vahaly (second round)
14. Wesley Moodie (second round)
15. Lars Burgsmüller (second round)
16. Grégory Carraz (second round)

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
	1	Rainer Schüttler	6	6
		Cyril Saulnier	3	2
								1	Rainer Schüttler	77	6
								2	Sébastien Grosjean	65	2
	3	Paradorn Srichaphan	6	3	4
	2	Sébastien Grosjean	4	6	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	R Schüttler	6	6
	WC	S Iwabuchi	77	6				WC	S Iwabuchi	0	4
		C Mamiit	64	2											1	R Schüttler	6	6
		R Kendrick	77	6												R Kendrick	3	2
		W Arthurs	63	4					R Kendrick	6	3	6
								13	B Vahaly	2	6	4
																						1	R Schüttler	6	6
																							S Draper	3	3
								LL	E Taino	2	65
	Q	J Vacek	3	64					S Draper	6	77
		S Draper	6	77												S Draper	7	6
		I Heuberger	2	61											6	N Kiefer	5	2
		A Bogomolov Jr.	6	77					A Bogomolov Jr.	5	67
								6	N Kiefer	7	79

Section 2

	First round							Second round							Third round							Quarterfinals
								4	J Novák	77	6
	Q	B Phau	61	77	77			Q	B Phau	62	2
		J Salzenstein	77	64	63										4	J Novák	6	5	4
		J Gimelstob	65	6	1											C Saulnier	4	7	6
		C Saulnier	77	3	6				C Saulnier	78	77
								15	L Burgsmüller	66	64
																							C Saulnier	5
																						5	M Philippoussis	2r
								10	M Ančić	6	7
		W Eschauer	0	4				Q	T Iwami	2	5
	Q	T Iwami	6	6											10	M Ančić	4	5
		F Browne	6	6											5	M Philippoussis	6	7
	WC	T Terachi	3	4					F Browne	4	3
								5	M Philippoussis	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								7	H-T Lee	6	63	6
	Q	G Weiner	4	2					F Verdasco	3	77	3
		F Verdasco	6	6											7	H-T Lee	6	6
		M Vassallo Argüello	0	3											9	K Carlsen	3	4
	WC	G Motomura	6	6				WC	G Motomura	2	64
								9	K Carlsen	6	77
																						7	H-T Lee	6	65	3
																						3	P Srichaphan	4	77	6
								14	W Moodie	1	63
		A Waske	65	3				WC	T Suzuki	6	77
	WC	T Suzuki	77	6											WC	T Suzuki	2	63
		D Norman	7	6											3	P Srichaphan	6	77
	Q	G Bastl	5	4					D Norman	6	63	62
								3	P Srichaphan	4	77	77

Section 4

	First round							Second round							Third round							Quarterfinals
								8	J-M Gambill	6	6
		I Miranda	6	4	4				B Ulihrach	3	4
		B Ulihrach	2	6	6										8	J-M Gambill	6	7
		T Berdych	62	6	3										Q	M Kratochvil	3	5
	Q	M Kratochvil	77	4	6			Q	M Kratochvil	6	6
								12	J van Lottum	2	3
																						8	J-M Gambill	3	64
																						2	S Grosjean	6	77
								16	G Carraz	5	6	5
		A Vinciguerra	6	4	1				D van Scheppingen	7	1	7
		D van Scheppingen	4	6	6											D van Scheppingen	3	63
		R Söderling	4	4											2	S Grosjean	6	77
		I Karlović	6	6					I Karlović	3	68
								2	S Grosjean	6	710

References

• 2003 AIG Japan Open Tennis Championships Draw
• 2003 AIG Japan Open Tennis Championships Qualifying Draw