2019 Keio Challenger – Men's singles

Yasutaka Uchiyama was the defending champion but chose not to defend his title.

Men's singles
2019 Keio Challenger
Champion	Kwon Soon-woo
Runner-up	Oscar Otte
Score	7–6(7–4), 6–3

Main article: 2019 Keio Challenger

Kwon Soon-woo won the title after defeating Oscar Otte 7–6^(7–4), 6–3 in the final.

Seeds

All seeds receive a bye into the second round.

1. Tatsuma Ito (third round)
2. Oscar Otte (final)
3. Yūichi Sugita (semifinals)
4. Hiroki Moriya (second round)
5. Mats Moraing (third round)
6. Jurij Rodionov (third round)
7. Go Soeda (third round)
8. Dudi Sela (quarterfinals)
9. Blaž Rola (third round)
10. Gianluca Mager (quarterfinals)
11. Kwon Soon-woo (champion)
12. Pedro Cachin (second round)
13. Guilherme Clezar (second round)
14. Filip Peliwo (third round)
15. Viktor Troicki (second round)
16. Enzo Couacaud (second round)

Draw

Key

• Q = Qualifier
• WC = Wild card
• LL = Lucky loser
• Alt = Alternate
• ITF = ITF entry
• PR = Protected ranking
• SR = Special ranking
• SE = Special exempt
• JE = Junior exempt
• JR = Junior Accelerator Programme entrant
• CO = College Accelerator Programme entrant
• NG = Next Gen Accelerator Program entrant
• w/o = Walkover
• r = Retired
• d = Defaulted

Finals

	Quarterfinals							Semifinals							Final
		Lee Duck-hee	1	0
	11	Kwon Soon-woo	6	6
								11	Kwon Soon-woo	6	6
								3	Yūichi Sugita	3	2
	3	Yūichi Sugita	2	6	7
	8	Dudi Sela	6	4	5
															11	Kwon Soon-woo	77	6
															2	Oscar Otte	64	3
		Yang Tsung-hua	5	64
		Andrew Harris	7	77
									Andrew Harris	3	4
								2	Oscar Otte	6	6
	10	Gianluca Mager	2	4
	2	Oscar Otte	6	6

Top half

Section 1

	First round							Second round							Third round							Quarterfinals
								1	T Ito	6	7
		Y Takahashi	5	7	2			ITF	M Echargui	0	5
	ITF	M Echargui	7	5	6										1	T Ito	3	6	67
		D-h Lee	6	6												D-h Lee	6	4	79
		Xia Zihao	0	3					D-h Lee	6	6
								16	E Couacaud	0	2
																							D-h Lee	1	0
																						11	S-w Kwon	6	6
								11	S-w Kwon	6	6
		Renta Tokuda	5	2				WC	M Imamura	2	2
	WC	M Imamura	7	6											11	S-w Kwon	6	6
	WC	S Hazawa	62	4											5	M Moraing	2	4
		TK Wang	77	6					TK Wang	68	2
								5	M Moraing	710	6

Section 2

	First round							Second round							Third round							Quarterfinals
								3	Y Sugita	2	6	7
		B Ellis	6	5	5			PR	D Nguyen	6	4	5
	PR	D Nguyen	3	7	7										3	Y Sugita	6	6
		G Oliveira	3	65											14	F Peliwo	4	2
	ITF	I Gakhov	6	77				ITF	I Gakhov	2	4
								14	F Peliwo	6	6
																						3	Y Sugita	2	6	7
																						8	D Sela	6	4	5
								9	B Rola	77	6
		K Uchida	6	6					K Uchida	63	4
		Roy Smith	3	3											9	B Rola	3	1
		L Saville	2	6	6										8	D Sela	6	6
	WC	K Uesugi	6	4	2				L Saville	2	0
								8	D Sela	6	6

Bottom half

Section 3

	First round							Second round							Third round							Quarterfinals
								6	J Rodionov	79	0	6
	LL	Shintaro Imai	2	3				ITF	D Pérez Sanz	67	6	4
	ITF	D Pérez Sanz	6	6											6	J Rodionov	4	4
		Y-s Chung	4	3												T-h Yang	6	6
		T-h Yang	6	6					T-h Yang	6	6
								12	P Cachin	4	4
																							T-h Yang	5	64
																							A Harris	7	77
								13	G Clezar	6	2	64
		D Wu	4	6	2				G Elias	0	6	77
		G Elias	6	3	6											G Elias	4	7	4
		A Harris	6	6												A Harris	6	5	6
	WC	Sung Yo-han	1	2					A Harris	6	6
								4	H Moriya	3	3

Section 4

	First round							Second round							Third round							Quarterfinals
								7	G Soeda	6	6
	Q	Kim Cheong-eui	6	6				Q	C-e Kim	1	4
	WC	Naoto Kai	1	3											7	G Soeda	6	5	5
	Q	C-h Tseng	6	3	6										10	G Mager	3	7	7
	ITF	S Mansouri	4	6	3			Q	C-h Tseng	63	65
								10	G Mager	77	77
																						10	G Mager	2	4
																						2	O Otte	6	6
								15	V Troicki	5	65
		M Purcell	6	6					M Purcell	7	77
		K King	2	2												M Purcell	6	5	4
		Y Bai	6	0	7										2	O Otte	1	7	6
		Makoto Ochi	2	6	5				Y Bai	3	2
								2	O Otte	6	6

References

• Main Draw
• Qualifying Draw