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Men's singles
2018 Keio Challenger
Final
Champion	Yasutaka Uchiyama
Runner-up	Tatsuma Ito
Score	2–6, 6–3, 6–4
Events
Singles men women Doubles men women
← 2017 · Keio Challenger · 2019 →

Yūichi Sugita was the defending champion but chose not to defend his title.

Yasutaka Uchiyama won the title after defeating Tatsuma Ito 2–6, 6–3, 6–4 in the final.

Seeds

1. Jordan Thompson (semifinals)
2. John Millman (second round, withdrew)
3. Jason Jung (second round)
4. Go Soeda (quarterfinals)
5. Stéphane Robert (quarterfinals)
6. Kwon Soon-woo (first round)
7. Tatsuma Ito (final)
8. Lee Duck-hee (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	Jordan Thompson	4	5
		Yasutaka Uchiyama	6	7
									Yasutaka Uchiyama	2	6	6
								7	Tatsuma Ito	6	3	4
		Cem İlkel
	7	Tatsuma Ito	w/o

Top half

	First round							Second round							Quarterfinals							Semifinals
	1	J Thompson	2	6	6
		P Gunneswaran	6	4	3			1	J Thompson	6	6
	Q	Hiroyasu Ehara	7	6	6			Q	H Ehara	4	2
		A Whittington	6	7	4										1	J Thompson	6	4	6
	LL	D Nguyen	6	6											5	S Robert	3	6	2
	WC	Yo Watanuki	2	4				LL	D Nguyen	5	0
	Q	Jumpei Yamasaki	6	1	3			5	S Robert	7	6
	5	S Robert	3	6	6																	1	J Thompson	4	5
	4	G Soeda	6	6																			Y Uchiyama	6	7
	WC	Kaito Itsusaki	0	2				4	G Soeda	7	6
		D Wu	6	7					D Wu	6	3
		Ze Zhang	4	6											4	G Soeda	6	6	3
		Y Uchiyama	6	3	6											Y Uchiyama	4	7	6
		H Hurkacz	4	6	4				Y Uchiyama	6	7
	WC	S Hazawa	6	4	7			WC	S Hazawa	3	5
	6	S-w Kwon	3	6	6

Bottom half

	First round							Second round							Quarterfinals							Semifinals
	8	D-h Lee	4	6	6
		T Pütz	6	4	3			8	D-h Lee	2	6	6
	SE	B Ellis	3	4					C İlkel	6	2	7
		C İlkel	6	6												C İlkel	7	6
		M Donati	7	2	5											T Kamke	6	2
		T Kamke	6	6	7				T Kamke	6	6
	Q	Y-s Chung	2	7	4			3	J Jung	4	2
	3	J Jung	6	6	6																		C İlkel
	7	T Ito	6	6																		7	T Ito	w/o
	WC	K Uesugi	2	3				7	T Ito	3	6	7
		J Kubler	6	1	6				J Kubler	6	3	6
		E Leshem	3	6	3										7	T Ito	6	6
		K Kravchuk	0	2											Q	H Moriya	3	3
	Q	H Moriya	6	6				Q	H Moriya	w/o
		M Purcell	3	6				2	J Millman
	2	J Millman	6	7

References

• Main draw
• Qualifying draw

• 2018 Keio Challenger