2019 Yokkaichi Challenger – Singles

Singles
2019 Yokkaichi Challenger
Champion	Yūichi Sugita
Runner-up	James Duckworth
Score	3–6, 6–3, 7–6(7–1)

This was the first edition of the tournament.^[1]

Yūichi Sugita won the title after defeating James Duckworth 3–6, 6–3, 7–6^(7–1) in the final.

All seeds receive a bye into the second round.

	Quarterfinals							Semifinals							Final
	ITF	Sho Shimabukuro	61	6	6
	11	Nam Ji-sung	77	3	2
								ITF	Sho Shimabukuro	5	3
								5	Yūichi Sugita	7	6
	4	Chung Hyeon
	5	Yūichi Sugita	w/o
															5	Yūichi Sugita	3	6	77
															2	James Duckworth	6	3	61
	9	Saketh Myneni	65	1
	3	Tatsuma Ito	77	6
								3	Tatsuma Ito	3	4
								2	James Duckworth	6	6
	10	Wu Tung-lin	3	1
	2	James Duckworth	6	6

	First round							Second round							Third round							Quarterfinals
								1	Y Uchiyama	67	77	3
	ITF	S Shimabukuro	6	6				ITF	S Shimabukuro	79	64	6
	ITF	Yuki Mochizuki	4	2											ITF	S Shimabukuro	6	1
		T Matsui	6	715												T Matsui	4	0r
	Alt	JP Fruttero	3	613					T Matsui	77	77
								13	Makoto Ochi	65	64
																						ITF	S Shimabukuro	61	6	6
																						11	J-s Nam	77	3	2
								11	J-s Nam	6	6
	ITF	Jumpei Yamasaki	6	6				ITF	J Yamasaki	3	2
		B Ellis	4	4											11	J-s Nam	6	5	77
		E Zhu	64	5											7	H Moriya	2	7	61
		W Trongcharoenchaikul	77	4r					E Zhu	65	65
								7	H Moriya	77	77

	First round							Second round							Third round							Quarterfinals
								4	Hy Chung	6	6
		M Romios	64	6	6				M Romios	3	1
	ITF	B Lock	77	2	2										4	Hy Chung	3	6	6
	Alt	CJ Lock	2	2											14	Y Takahashi	6	1	4
		Kazuki Nishiwaki	6	6					K Nishiwaki	5	6	3
								14	Y Takahashi	7	3	6
																						4	Hy Chung
																						5	Y Sugita	w/o
								12	T-h Yang	1	6	6
		Y Shimizu	6	6					Y Shimizu	6	1	4
		M-k Song	3	3											12	T-h Yang	3	1
	WC	Yuya Ito	6	6											5	Y Sugita	6	6
		H Bourchier	3	3				WC	Y Ito	3	6	2
								5	Y Sugita	6	3	6

	First round							Second round							Third round							Quarterfinals
								8	Y-s Chung	77	6
		D Kelly	62	0r					A Ayeni	61	3
		Alafia Ayeni	77	0											8	Y-s Chung	3	6	3
		Kazuma Kawachi	6	4	0r										9	S Myneni	6	3	6
	WC	Yasunori Hashikawa	2	6	4			WC	Y Hashikawa	2	64
								9	S Myneni	6	77
																						9	S Myneni	65	1
																						3	T Ito	77	6
								15	Renta Tokuda	6	67	0
	WC	S Hazawa	6	6				WC	S Hazawa	4	79	6
		T Fancutt	4	1											WC	S Hazawa	0	3
		Sora Fukuda	4	3											3	T Ito	6	6
	ITF	K Takeuchi	6	6				ITF	K Takeuchi	65	1
								3	T Ito	77	6

	First round							Second round							Third round							Quarterfinals
								6	Ze Zhang	6	65	5
		Kosuke Ogura	1	3					S Sekiguchi	3	77	7
		Shuichi Sekiguchi	6	6												S Sekiguchi	4	0r
		Issei Okamura	3	3											10	T-l Wu	6	0
		J Cui	6	6					J Cui	3	61
								10	T-l Wu	6	77
																						10	T-l Wu	3	1
																						2	J Duckworth	6	6
								16	NH Lý	6	2	3
		Shintaro Imai	6	6					S Imai	2	6	6
		N Tajima	2	3												S Imai	2	3
		Ren Nakamura	1	2											2	J Duckworth	6	6
		L Catarina	6	6					L Catarina	1	3
								2	J Duckworth	6	6

• Main draw