|   Shanghai | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 02.10. | 
			  | 
			Arnaldi M. - Sakamoto R. | 
			1R | 
			7-63, 6-4 | 
			1.57 | 
			2.37 | 
		
		
			| 30.09. | 
			  | 
			Sakamoto R. - McDonald M. | 
			Q-2R | 
			6-4, 6-3 | 
			2.50 | 
			1.50 | 
		
		
			| 29.09. | 
			  | 
			Sakamoto R. - Holt B. | 
			Q-1R | 
			6-1, 7-5 | 
			1.85 | 
			1.90 | 
		
		
			|   Tokyo (Japan Open) | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 23.09. | 
			  | 
			Vukic A. - Sakamoto R. | 
			Q-QF | 
			6-4, 7-65 | 
			1.55 | 
			2.42 | 
		
		
			| 22.09. | 
			  | 
			Sakamoto R. - Walton A. | 
			Q-R16 | 
			6-2, 6-4 | 
			2.77 | 
			1.42 | 
		
		
			|   Chengdu | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 16.09. | 
			  | 
			Basilashvili N. - Sakamoto R. | 
			Q-R16 | 
			6-2, 3-6, 6-1 | 
			1.71 | 
			2.10 | 
		
		
			|   US Open | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 21.08. | 
			  | 
			Buse I. - Sakamoto R. | 
			Q-2R | 
			6-4, 4-6, 6-4 | 
			1.72 | 
			2.06 | 
		
		
			| 20.08. | 
			  | 
			Sakamoto R. - Zink T. | 
			Q-1R | 
			4-6, 7-5, 7-68 | 
			1.47 | 
			2.59 | 
		
		
			|   Sumter challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 12.08. | 
			  | 
			Bigun K. - Sakamoto R. | 
			1R | 
			6-3, 6-1 | 
			3.39 | 
			1.29 | 
		
		
			|   Lexington challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 01.08. | 
			  | 
			Spizzirri E. - Sakamoto R. | 
			R16 | 
			7-65, 67-7, 4-3 | 
			1.68 | 
			2.10 | 
		
		
			| 29.07. | 
			  | 
			Sakamoto R. - Ghibaudo A. | 
			1R | 
			1-6, 6-4, 6-2 | 
			1.27 | 
			3.57 | 
		
		
			|   Bloomfield Hills challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 22.07. | 
			  | 
			Spizzirri E. - Sakamoto R. | 
			1R | 
			3-6, 6-3, 6-4 | 
			1.68 | 
			2.09 | 
		
		
			|   Winnipeg challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 10.07. | 
			  | 
			Blockx A. - Sakamoto R. | 
			R16 | 
			6-2, 7-5 | 
			1.69 | 
			2.09 | 
		
		
			| 09.07. | 
			  | 
			Sakamoto R. - Nakagawa N. | 
			1R | 
			7-64, 2-6, 6-3 | 
			1.12 | 
			5.87 | 
		
		
			|   Cary challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 06.07. | 
			  | 
			Sakamoto R. - Draxl L. | 
			F | 
			6-1, 6-4 | 
			2.11 | 
			1.68 | 
		
		
			| 05.07. | 
			  | 
			Sakamoto R. - Kypson P. | 
			SF | 
			7-61, 7-66 | 
			2.41 | 
			1.53 | 
		
		
			| 04.07. | 
			  | 
			Sakamoto R. - Schoolkate T. | 
			QF | 
			7-62, 6-4 | 
			2.29 | 
			1.57 | 
		
		
			| 03.07. | 
			  | 
			Sakamoto R. - Maloney P. | 
			R16 | 
			3-6, 6-1, 6-2 | 
			1.41 | 
			2.76 | 
		
		
			| 01.07. | 
			  | 
			Sakamoto R. - Mejia N. | 
			1R | 
			68-7, 6-3, 6-3 | 
			1.61 | 
			2.21 | 
		
		
			|   Gwangju challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 21.04. | 
			  | 
			Schoolkate T. - Sakamoto R. | 
			1R | 
			7-64, 7-5 | 
			1.66 | 
			2.14 | 
		
		
			|   Busan challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 15.04. | 
			  | 
			Kubler J. - Sakamoto R. | 
			1R | 
			7-5, 6-4 | 
			1.96 | 
			1.79 | 
		
		
			|   Miami | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 19.03. | 
			  | 
			Muller A. - Sakamoto R. | 
			1R | 
			6-4, 6-4 | 
			1.46 | 
			2.68 | 
		
		
			| 18.03. | 
			  | 
			Sakamoto R. - Duckworth J. | 
			Q-2R | 
			7-5, 7-65 | 
			2.32 | 
			1.58 | 
		
		
			| 17.03. | 
			  | 
			Sakamoto R. - Majchrzak K. | 
			Q-1R | 
			6-4, 65-7, 6-2 | 
			2.92 | 
			1.39 | 
		
		
			|   Cap Cana challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 13.03. | 
			  | 
			Mensik J. - Sakamoto R. | 
			R16 | 
			6-4, 6-2 | 
			1.14 | 
			5.21 | 
		
		
			| 12.03. | 
			  | 
			Sakamoto R. - Nanda G. | 
			1R | 
			6-3, 6-4 | 
			1.67 | 
			2.12 | 
		
		
			| 11.03. | 
			  | 
			Sakamoto R. - Miedler L. | 
			Q-QF | 
			6-3, 7-62 | 
			1.21 | 
			4.03 | 
		
		
			| 10.03. | 
			  | 
			Sakamoto R. - Arribage T. | 
			Q-R16 | 
			6-1, 6-0 | 
			1.08 | 
			6.84 | 
		
		
			|   Tenerife 2 challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 10.02. | 
			  | 
			Misolic F. - Sakamoto R. | 
			Q-R16 | 
			6-4, 6-2 | 
			2.25 | 
			1.59 | 
		
		
			| 09.02. | 
			  | 
			Sakamoto R. - Sanchez Quilez A. | 
			Q-1R | 
			6-1, 6-1 | 
			1.23 | 
			3.83 | 
		
		
			|   Tenerife challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 04.02. | 
			  | 
			Hassan B. - Sakamoto R. | 
			1R | 
			4-6, 6-2, 6-4 | 
			1.98 | 
			1.76 | 
		
		
			|   Australian Open | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 07.01. | 
			  | 
			Boyer T. - Sakamoto R. | 
			Q-1R | 
			6-0, 6-2 | 
			1.54 | 
			2.41 | 
		
		
			|   Nonthaburi challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 03.01. | 
			  | 
			Barrere G. - Sakamoto R. | 
			SF | 
			6-4, 3-6, 7-66 | 
			1.58 | 
			2.29 | 
		
		
			| 02.01. | 
			  | 
			Sakamoto R. - Mager G. | 
			QF | 
			4-1 | 
			1.56 | 
			2.32 | 
		
		
			| 01.01. | 
			  | 
			Sakamoto R. - Chidekh C. | 
			R16 | 
			6-3, 6-0 | 
			2.33 | 
			1.56 | 
		
		
			| 31.12. | 
			  | 
			Sakamoto R. - Sharipov M. | 
			1R | 
			7-63, 2-6, 6-4 | 
			1.76 | 
			1.97 | 
		
		
			| 30.12. | 
			  | 
			Sakamoto R. - Leong M. | 
			Q-R16 | 
			6-2, 6-3 | 
			1.30 | 
			3.26 | 
		
		
			| 29.12. | 
			  | 
			Sakamoto R. - Cukierman D. | 
			Q-1R | 
			3-6, 6-3, 6-4 | 
			1.45 | 
			2.60 |