Challenger - Cleveland 01/30 16:55 19 Kodat, Toby Alex v Blumberg, William 6-3,6-4
Challenger - Cleveland 01/29 17:35 14 Lapadat, Joshua v Blumberg, William 4-6,3-6
Challenger Fairfield 10/09 23:00 14 Blumberg, William v Alafia Ayeni 6-2,3-6,5-7
Newport, USA 07/12 15:00 25 [48] Benjamin Bonzi v Blumberg, William [109] 2-6,6-3,6-2
Newport, USA 07/11 15:00 19 Noah Rubin v Blumberg, William 6-4,3-6,2-6
Newport, USA 07/10 16:50 14 [113] Blumberg, William v Ramkumar Ramanathan [169] 3-6,7-5,6-4
Monterrey, Mexico 03/08 18:00 25 [159] Blumberg, William v Rinky Hijikata [337] 6-2,3-6,0-6
Monterrey, Mexico 03/07 18:00 19 [402] Gilbert Klier Junior v Blumberg, William [159] 4-6,4-6
Monterrey, Mexico 03/06 20:10 14 [160] Blumberg, William v King, Evan [116] 6-7,7-6,6-1
Challenger - Cleveland 02/04 16:25 27 [123] Yoshihito Nishioka v Blumberg, William [178] 3-6,6-4,6-2
Challenger - Cleveland 02/03 16:00 26 [178] Blumberg, William v Emilio Gomez [142] Retired
Challenger - Cleveland 02/01 22:10 25 [380] Quiroz, Roberto v Blumberg, William [179] 4-6,7-6,4-6
Challenger Cary 07/20 22:55 25 [284] Blumberg, William v Mitchell Krueger [194] 6-4,3-6,6-7
Newport, USA 07/11 16:35 14 Alex Bolt v Blumberg, William 7-6,7-6
Weston, FL, Singles M-ITF-USA-05A 07/01 21:55 25 Blumberg, William v Strong Kirchheimer 3-6,3-6
Challenger Cary 11/10 15:30 25 Torpegaard, Mikael v Blumberg, William 3-6,6-3,6-4
Exo-Tennis Atlanta 2020 05/16 18:00 1 Blumberg, William v Roelofse, Ruan Cancelled
Exo-Tennis Atlanta 2020 05/16 15:00 1 Blumberg, William v Christopher Eubanks Cancelled
Exo-Tennis Atlanta 2020 05/15 21:20 1 Blumberg, William v Pasha, Nathan Walkover
Exo-Tennis Atlanta 2020 05/15 16:35 1 Blumberg, William v Young, Donald 1-6,2-6
Exo-Tennis Atlanta 2020 05/14 18:50 1 King, Kevin v Blumberg, William 7-5,6-4
Exo-Tennis Atlanta 2020 05/14 15:25 1 Lovett, Korey v Blumberg, William 1-6,1-6
ITF M15 Tallahassee 12/05 16:50 26 Blumberg, William v Guy Orly Iradukunda 6-2,6-7,4-6
ITF M15 Tallahassee 12/03 19:00 25 Stalder, Reese v Blumberg, William 2-6,4-6
Challenger Champaign 11/12 17:35 24 Blumberg, William v Song, Evan 4-6,5-7
Challenger Champaign 11/11 16:00 28 Wettengel, Chris v Blumberg, William 2-6,2-6
Challenger Dallas 02/04 18:35 24 [442] Blumberg, William v Millot, Vincent [326] 4-6,5-7
ITF USA F27 10/10 15:00 25 Arconada, Jordi v Blumberg, William Retired
Challenger Stockton 10/04 16:30 26 Blumberg, William v Noah Rubin 1-6,6-4,4-6
Challenger Stockton 10/02 17:00 25 Blumberg, William v Aragone, JC 3-6,6-2,6-2