|   AO Wildcard Playoff - USA | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 15.12. | 
			  | 
			Williams R. - Kosakowski D. | 
			QF | 
			6-1, 6-4 | 
			  | 
			  | 
		
		
			|   Charlottesville challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 30.10. | 
			  | 
			Daniel T. - Kosakowski D. | 
			1R | 
			6-3, 1-6, 6-3 | 
			2.71 | 
			1.40 | 
		
		
			|   Tiburon challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 12.10. | 
			  | 
			Blake J. - Kosakowski D. | 
			R16 | 
			6-2, 6-3 | 
			1.20 | 
			4.04 | 
		
		
			| 10.10. | 
			  | 
			Kosakowski D. - Borvanov R. | 
			1R | 
			6-0, 3-6, 6-1 | 
			1.24 | 
			3.50 | 
		
		
			|   Sacramento challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 06.10. | 
			  | 
			Zverev M. - Kosakowski D. | 
			SF | 
			6-2, 6-2 | 
			1.57 | 
			2.25 | 
		
		
			| 05.10. | 
			  | 
			Kosakowski D. - Viola M. | 
			QF | 
			6-4, 6-4 | 
			  | 
			  | 
		
		
			| 04.10. | 
			  | 
			Kosakowski D. - McClune M. | 
			R16 | 
			4-6, 7-65, 6-2 | 
			  | 
			  | 
		
		
			| 02.10. | 
			  | 
			Kosakowski D. - Becker B. | 
			1R | 
			7-5, 6-3 | 
			2.84 | 
			1.37 | 
		
		
			|   Futures 2012 | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 23.09. | 
			  | 
			Kosakowski D. - Dadamo J. | 
			F | 
			6-4, 7-5 | 
			1.56 | 
			2.23 | 
		
		
			| 22.09. | 
			  | 
			Kosakowski D. - Britton D. | 
			SF | 
			7-5, 7-65 | 
			1.36 | 
			2.94 | 
		
		
			| 21.09. | 
			  | 
			Kosakowski D. - Nguyen D. | 
			QF | 
			2-6, 6-2, 6-3 | 
			1.28 | 
			3.42 | 
		
		
			| 19.09. | 
			  | 
			Kosakowski D. - Thacher R. | 
			R16 | 
			6-0, 6-3 | 
			  | 
			  | 
		
		
			| 19.09. | 
			  | 
			Kosakowski D. - Farren C. | 
			1R | 
			6-3, 6-1 | 
			  | 
			  | 
		
		
			| 16.09. | 
			  | 
			Kosakowski D. - Amritraj P. | 
			F | 
			6-3, 6-1 | 
			1.66 | 
			2.10 | 
		
		
			| 15.09. | 
			  | 
			Kosakowski D. - Nguyen D. | 
			SF | 
			7-63, 6-3 | 
			  | 
			  | 
		
		
			| 14.09. | 
			  | 
			Kosakowski D. - Jung J. | 
			QF | 
			4-6, 6-1, 6-4 | 
			  | 
			  | 
		
		
			| 13.09. | 
			  | 
			Kosakowski D. - Rowe R. | 
			R16 | 
			6-4, 7-64 | 
			  | 
			  | 
		
		
			| 12.09. | 
			  | 
			Kosakowski D. - Altamirano C. | 
			1R | 
			6-2, 6-2 | 
			1.04 | 
			9.75 | 
		
		
			|   US Open | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 24.08. | 
			  | 
			Moriya H. - Kosakowski D. | 
			Q-3R | 
			4-6, 7-65, 6-3 | 
			1.95 | 
			1.78 | 
		
		
			| 23.08. | 
			  | 
			Kosakowski D. - Bedene A. | 
			Q-2R | 
			6-3, 3-6, 7-67 | 
			3.12 | 
			1.32 | 
		
		
			| 22.08. | 
			  | 
			Kosakowski D. - Huta-Galung J. | 
			Q-1R | 
			6-4, 6-2 | 
			2.13 | 
			1.64 | 
		
		
			|   Aptos challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 06.08. | 
			  | 
			Tursunov D. - Kosakowski D. | 
			Q-QF | 
			6-1, 6-3 | 
			1.25 | 
			3.45 | 
		
		
			| 05.08. | 
			  | 
			Kosakowski D. - Kryvonos N. | 
			Q-R16 | 
			6-3, 2-6, 6-2 | 
			  | 
			  | 
		
		
			| 04.08. | 
			  | 
			Kosakowski D. - King-Turner D. | 
			Q-1R | 
			6-1, 6-4 | 
			  | 
			  | 
		
		
			|   Lexington challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 24.07. | 
			  | 
			Krajicek A. - Kosakowski D. | 
			1R | 
			6-4, 6-4 | 
			2.18 | 
			1.61 | 
		
		
			|   Granby challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 16.07. | 
			  | 
			Authom M. - Kosakowski D. | 
			1R | 
			7-64, 6-4 | 
			1.56 | 
			2.28 | 
		
		
			|   Panama City challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 06.07. | 
			  | 
			Witten J. - Kosakowski D. | 
			R16 | 
			6-3, 6-2 | 
			3.30 | 
			1.30 | 
		
		
			| 05.07. | 
			  | 
			Kosakowski D. - Russell M. | 
			1R | 
			7-62, 6-2 | 
			3.09 | 
			1.33 | 
		
		
			|   Futures 2012 | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 24.06. | 
			  | 
			Rochette L. - Kosakowski D. | 
			F | 
			7-6, 6-4 | 
			  | 
			  | 
		
		
			| 23.06. | 
			  | 
			Kosakowski D. - Renavand N. | 
			SF | 
			6-4, 6-2 | 
			  | 
			  | 
		
		
			| 22.06. | 
			  | 
			Kosakowski D. - Musialek A. | 
			QF | 
			7-61, 6-3 | 
			  | 
			  | 
		
		
			| 20.06. | 
			  | 
			Kosakowski D. - Rancezot A. | 
			R16 | 
			6-4, 6-2 | 
			  | 
			  | 
		
		
			| 19.06. | 
			  | 
			Kosakowski D. - Gorban A. | 
			1R | 
			6-3, 6-4 | 
			  | 
			  | 
		
		
			|   Monza challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 10.06. | 
			  | 
			Comporto A. - Kosakowski D. | 
			Q-QF | 
			6-7, 6-2, 7-6 | 
			  | 
			  | 
		
		
			| 09.06. | 
			  | 
			Kosakowski D. - Bega A. | 
			Q-R16 | 
			6-4, 4-6, 7-6 | 
			  | 
			  | 
		
		
			|   Caltanissetta challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 08.06. | 
			  | 
			Gonzalez A. - Kosakowski D. | 
			QF | 
			7-63, 7-61 | 
			1.62 | 
			2.15 | 
		
		
			| 07.06. | 
			  | 
			Kosakowski D. - Gil F. | 
			R16 | 
			6-3, 6-4 | 
			4.10 | 
			1.21 | 
		
		
			| 06.06. | 
			  | 
			Kosakowski D. - Alves T. | 
			1R | 
			6-3, 6-2 | 
			3.15 | 
			1.32 | 
		
		
			| 04.06. | 
			  | 
			Kosakowski D. - Rochette L. | 
			Q-QF | 
			7-6, 7-6 | 
			  | 
			  | 
		
		
			| 03.06. | 
			  | 
			Kosakowski D. - Oswald P. | 
			Q-R16 | 
			7-5, 4-6, 6-4 | 
			  | 
			  | 
		
		
			| 02.06. | 
			  | 
			Kosakowski D. - Giacalone O. | 
			Q-1R | 
			6-4, 4-6, 7-6 | 
			  | 
			  | 
		
		
			|   Futures 2012 | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 30.05. | 
			  | 
			Trungelliti M. - Kosakowski D. | 
			R16 | 
			7-63, 2-6, 6-2 | 
			  | 
			  | 
		
		
			| 29.05. | 
			  | 
			Kosakowski D. - Trevisan M. | 
			1R | 
			6-3, 6-2 | 
			  | 
			  | 
		
		
			|   Savannah challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 23.04. | 
			  | 
			Lammer M. - Kosakowski D. | 
			1R | 
			5-7, 6-3, 6-2 | 
			2.00 | 
			1.71 | 
		
		
			|   Sarasota challenger | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 15.04. | 
			  | 
			Delic A. - Kosakowski D. | 
			Q-R16 | 
			6-1, 6-7, 6-4 | 
			  | 
			  | 
		
		
			| 14.04. | 
			  | 
			Kosakowski D. - Cox J. | 
			Q-1R | 
			6-4, 6-4 | 
			  | 
			  | 
		
		
			|   Houston | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 09.04. | 
			  | 
			Russell M. - Kosakowski D. | 
			Q-QF | 
			6-4, 6-1 | 
			1.33 | 
			3.05 | 
		
		
			| 08.04. | 
			  | 
			Kosakowski D. - Sugita Y. | 
			Q-R16 | 
			7-64, 6-4 | 
			2.28 | 
			1.54 | 
		
		
			| 07.04. | 
			  | 
			Kosakowski D. - Zverev M. | 
			Q-1R | 
			3-6, 6-4, 3-0 | 
			  | 
			  | 
		
		
			|   Tallahassee chall. | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 04.04. | 
			  | 
			Reynolds B. - Kosakowski D. | 
			R16 | 
			3-6, 6-3, 6-2 | 
			1.25 | 
			3.68 | 
		
		
			| 02.04. | 
			  | 
			Kosakowski D. - Seifert S. | 
			1R | 
			6-3, 5-7, 7-66 | 
			2.42 | 
			1.50 | 
		
		
			| 01.04. | 
			  | 
			Emmrich M. - Kosakowski D. | 
			Q-QF | 
			6-4, 6-2 | 
			  | 
			  | 
		
		
			| 31.03. | 
			  | 
			Kosakowski D. - Wolmarans F. | 
			Q-R16 | 
			6-1, 6-3 | 
			  | 
			  | 
		
		
			| 30.03. | 
			  | 
			Kosakowski D. - Zavala J. | 
			Q-1R | 
			3-6, 6-3, 6-4 | 
			  | 
			  | 
		
		
			|   Futures 2012 | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 21.03. | 
			  | 
			Garanganga T. - Kosakowski D. | 
			R16 | 
			6-4, 7-5 | 
			  | 
			  | 
		
		
			| 20.03. | 
			  | 
			Kosakowski D. - Sarkissian A. | 
			1R | 
			6-2, 6-2 | 
			  | 
			  | 
		
		
			| 19.03. | 
			  | 
			Sandgren T. - Kosakowski D. | 
			F | 
			6-3, 7-5 | 
			  | 
			  | 
		
		
			| 16.03. | 
			  | 
			Kosakowski D. - Ball C. | 
			SF | 
			6-4, 6-4 | 
			  | 
			  | 
		
		
			| 15.03. | 
			  | 
			Kosakowski D. - Baker B. | 
			QF | 
			6-4, 6-4 | 
			  | 
			  | 
		
		
			| 14.03. | 
			  | 
			Kosakowski D. - Bangoura S. | 
			R16 | 
			6-0, 7-5 | 
			  | 
			  | 
		
		
			| 13.03. | 
			  | 
			Kosakowski D. - Lindahl N. | 
			1R | 
			7-5, 7-5 | 
			  | 
			  | 
		
		
			|   Indian Wells | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 07.03. | 
			  | 
			Lorenzi P. - Kosakowski D. | 
			Q-2R | 
			6-2, 7-64 | 
			1.46 | 
			2.53 | 
		
		
			| 07.03. | 
			  | 
			Kosakowski D. - Chiudinelli M. | 
			Q-1R | 
			7-65, 6-3 | 
			6.19 | 
			1.11 | 
		
		
			|   Futures 2012 | 
			Round | 
			Result | 
			H | 
			A | 
		
		
			| 02.03. | 
			  | 
			Fabbiano T. - Kosakowski D. | 
			QF | 
			6-3, 7-6 | 
			1.44 | 
			2.62 | 
		
		
			| 29.02. | 
			  | 
			Kosakowski D. - Lacroix A. | 
			R16 | 
			3-6, 7-63, 6-4 | 
			  | 
			  | 
		
		
			| 28.02. | 
			  | 
			Kosakowski D. - Cutura M. | 
			1R | 
			7-5, 6-1 | 
			  | 
			  | 
		
		
			| 23.02. | 
			  | 
			Polansky P. - Kosakowski D. | 
			QF | 
			6-2, 6-1 | 
			  | 
			  | 
		
		
			| 22.02. | 
			  | 
			Kosakowski D. - Luetjen J. | 
			R16 | 
			6-4, 2-6, 6-2 | 
			  | 
			  | 
		
		
			| 21.02. | 
			  | 
			Kosakowski D. - O'Brien D. | 
			1R | 
			7-5, 6-2 | 
			  | 
			  | 
		
		
			| 24.01. | 
			  | 
			Halebian A. - Kosakowski D. | 
			1R | 
			6-4, 1-6, 6-4 | 
			  | 
			  | 
		
		
			| 17.01. | 
			  | 
			Sousa P. - Kosakowski D. | 
			1R | 
			6-4, 6-3 | 
			  | 
			  | 
		
		
			| 10.01. | 
			  | 
			Middelkoop M. - Kosakowski D. | 
			1R | 
			6-4, 3-6, 6-4 | 
			  | 
			  |