Men's singles
2008 AIG Japan Open Tennis Championships
Champion	Tomáš Berdych
Runner-up	Juan Martín del Potro
Score	6–1, 6–4
Draw	64 (6Q / 4WC)
Seeds	16

David Ferrer was the defending champion, but lost in the quarterfinals to Juan Martín del Potro.

Ninth-seeded Tomáš Berdych won in the final 6–1, 6–4, against Juan Martín del Potro.

Seeds

All seeds received a bye into the second round.

Draw

Finals

	Quarterfinals							Semifinals							Final
	1	David Ferrer	1	5
	5	Juan Martín del Potro	6	7
								5	Juan Martín del Potro	6	4	7
								4	Richard Gasquet	3	6	5
	4	Richard Gasquet	6	6
	12	Rainer Schüttler	3	2
															5	Juan Martín del Potro	1	4
															9	Tomáš Berdych	6	6
	9	Tomáš Berdych	6	6
	3	Fernando González	0	4
								9	Tomáš Berdych	63	7	77
								2	Andy Roddick	77	5	63
		Viktor Troicki	3	4
	2	Andy Roddick	6	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	D Ferrer	6	4	6
		J Levine	4	6	6				J Levine	4	6	1
	Q	D Udomchoke	6	1	0										1	D Ferrer	4	6	6
	WC	Y Sugita	3	66											WC	T Suzuki	6	3	2
	WC	T Suzuki	6	78				WC	T Suzuki	77	4	77
								15	S Bolelli	65	6	65
																						1	D Ferrer	1	5
																						5	JM del Potro	6	7
								11	J Nieminen	79	6
	Q	C Mamiit	3	7	6			Q	C Mamiit	67	4
	LL	B Evans	6	5	4										11	J Nieminen	1	3
		D Sela	7	6											5	JM del Potro	6	6
		B Phau	5	1					D Sela	5	0
								5	JM del Potro	7	6

Section 2

	First round							Second round							Third round							Quarterfinals
								4	R Gasquet	6	6
	Q	M Slanar	4	6	6			Q	M Slanar	4	2
		D Young	6	3	2										4	R Gasquet	6	6
		K Nishikori	77	65	6											K Nishikori	1	2
		R Kendrick	63	77	2				K Nishikori	6	6
								16	G García López	4	4
																						4	R Gasquet	6	6
																						12	R Schüttler	3	2
								12	R Schüttler	6	63	6
	WC	S Iwabuchi	1	4					H-t Lee	3	77	3
		H-t Lee	6	6											12	R Schüttler	6	612	6
		F Cipolla	77	77											8	M Youzhny	3	714	4
		I Navarro	65	64					F Cipolla	2	2
								8	M Youzhny	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								6	T Robredo	6	6
		J Sirianni	6	6					J Sirianni	2	2
	Q	Y Ito	3	2											6	T Robredo	66	2
		R Karanušić	6	6											9	T Berdych	78	6
	Q	H Kondo	2	2					R Karanušić	3	4
								9	T Berdych	6	6
																						9	T Berdych	6	6
																						3	F González	0	4
								13	S Querrey	65	3
		G Soeda	4	2					A Delić	77	6
		A Delić	6	6												A Delić	4	64
		Y-h Lu	6	77											3	F González	6	77
	Q	L Gregorc	4	65					Y-h Lu	6	5	3
								3	F González	1	7	6

Section 4

	First round							Second round							Third round							Quarterfinals
								7	J-W Tsonga	4	77	6
		B Reynolds	6	6					B Reynolds	6	64	4
	WC	T Ito	3	1											7	J-W Tsonga	7	1r
		W Odesnik	6	6												V Troicki	5	2
		K Kim	4	3					W Odesnik	2	1
									V Troicki	6	6
																							V Troicki	3	4
																						2	A Roddick	6	6
								14	J Melzer	6	6
		S Stadler	6	6					S Stadler	2	3
		P Petzschner	2	4											14	J Melzer	62	2
		I Minář	711	2	6										2	A Roddick	77	6
		M Zverev	69	6	2				I Minář	611	77	62
								2	A Roddick	713	64	77

External links

• Draw
• Qualifying draw