2025 Keio Challenger – Men's singles

Men's singles
2025 Keio Challenger
2024 Champion	Yuta Shimizu
Events
Singles men women Doubles men women
←  2024  · Keio Challenger ·  2026  →

Main article: 2025 Keio Challenger

Yuta Shimizu was the defending champion ^[1] but lost in the second round to Yusuke Kusuhara.

Seeds

1. Kei Nishikori (quarterfinals)
2. Rei Sakamoto
3. Elias Ymer (first round, retired)
4. Oliver Crawford (first round)
5. Hsu Yu-hsiou (first round)
6. Yuta Shimizu (second round)
7. Yasutaka Uchiyama (quarterfinals)
8. Kaichi Uchida

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

Semifinals

Final

8

Kaichi Uchida

Q

Igor Marcondes

Akira Santillan

2

Rei Sakamoto

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	K Nishikori	4	6	6
	Q	T Ichikawa	6	1	1			1	K Nishikori	6	6
	WC	Lennon Roark Jones	6	1	2				S-h Shin	4	1
		Shin San-hui	3	6	6										1	K Nishikori	2	2
		M Jones	63	2											8	K Uchida	6	6
	Q	Ryotaro Taguchi	77	6				Q	R Taguchi	5	4
		H Chung	3	0				8	K Uchida	7	6
	8	K Uchida	6	6																		8	K Uchida
	4	O Crawford	4	4																		Q	I Marcondes
	Q	I Marcondes	6	6				Q	I Marcondes	6	77
	Q	Jumpei Yamasaki	4	65					Y Mochizuki	2	65
		Yuki Mochizuki	6	77											Q	I Marcondes	6	6
		Max Basing	6	2	3											N Oberleitner	1	3
		Hikaru Shiraishi	2	6	6				H Shiraishi	5	6	3
		N Oberleitner	7	6					N Oberleitner	7	4	6
	5	Y-h Hsu	5	2

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	6	Y Shimizu	6	6
		Y Takahashi	2	2				6	Y Shimizu	3	3
		K Isomura	5	3				Q	Y Kusuhara	6	6
	Q	Yusuke Kusuhara	7	6											Q	Y Kusuhara	3	2
		A Santillan	6	6												A Santillan	6	6
	WC	M Imamura	0	2					A Santillan	6	6
	JR	K Bigun	3					JR	K Bigun	3	1
	3	E Ymer	0r																				A Santillan
	7	Y Uchiyama	6	713																		2	R Sakamoto
		T-h Huang	4	611				7	Y Uchiyama	6	6
		Shin Woo-bin	3	3				Q	M Vrbenský	3	3
	Q	M Vrbenský	6	6											7	Y Uchiyama	6	3	4
		Maxim Zhukov	6	6											2	R Sakamoto	3	6	6
	WC	Ryo Tabata	4	4					M Zhukov	1	2
		K Samrej	4	61				2	R Sakamoto	6	6
	2	R Sakamoto	6	77

References

1. Heer, Florian (November 30, 2023). "Watanuki Wins Yokohama Keio Challenger".

External links

• Main draw
• Qualifying draw