| 2‑Nov‑2020 | Paris Masters | Hard | R32 | 42 | 7 | (4)Alexander Zverev [GER] d. Kecmanovic | 6-2 6-2 | | 0.37 | 4.3% | 6.4% | 55.3% | 61.5% | 33.3% | 2/6 | 0:55 |
| 2‑Nov‑2020 | Paris Masters | Hard | R64 | 42 | 38 | Kecmanovic d. John Millman [AUS] | 6-4 6-2 | | 1.45 | 9.8% | 2.0% | 52.9% | 81.5% | 54.2% | 2/3 | 1:17 |
| 26‑Oct‑2020 | Nur-Sultan | Hard | R16 | 40 | 64 | Frances Tiafoe [USA] d. (2)Kecmanovic | 7-5 6-3 | | 0.49 | 6.1% | 8.5% | 45.1% | 59.5% | 48.9% | 6/10 | 1:20 |
| 19‑Oct‑2020 | Cologne 2 | Hard | R16 | 39 | 41 | (8)Adrian Mannarino [FRA] d. Kecmanovic | 6-3 6-3 | | 0.57 | 2.9% | 1.4% | 62.9% | 61.4% | 42.3% | 9/13 | 1:17 |
| 19‑Oct‑2020 | Cologne 2 | Hard | R32 | 39 | 130 | Kecmanovic d. (LL)Sumit Nagal [IND] | 4-6 7-6(4) 6-1 | | 1.23 | 9.5% | 0.0% | 63.2% | 71.7% | 48.6% | 5/9 | 2:15 |
| 12‑Oct‑2020 | St Petersburg | Hard | R16 | 41 | 75 | Cameron Norrie [GBR] d. Kecmanovic | 7-5 6-7(5) 6-3 | | 0.88 | 3.1% | 2.3% | 60.2% | 70.1% | 41.2% | 11/17 | 2:44 |
| 12‑Oct‑2020 | St Petersburg | Hard | R32 | 41 | 88 | Kecmanovic d. Mikhail Kukushkin [KAZ] | 6-3 7-6(7) | | 1.18 | 6.4% | 5.1% | 56.4% | 70.5% | 55.9% | 3/5 | 1:36 |
| 28‑Sep‑2020 | Roland Garros | Clay | R128 | 41 | 14 | (12)Diego Schwartzman [ARG] d. Kecmanovic | 6-0 6-1 6-3 | | 0.65 | 1.4% | 5.7% | 61.4% | 44.2% | 29.6% | 5/14 | 1:47 |
| 14‑Sep‑2020 | Rome Masters | Clay | R64 | 39 | 50 | Yoshihito Nishioka [JPN] d. Kecmanovic | 6-4 6-1 | | 0.66 | 2.7% | 1.4% | 50.7% | 59.5% | 38.9% | 7/12 | 1:17 |
| 7‑Sep‑2020 | Kitzbuhel | Clay | F | 47 | 118 | Kecmanovic d. (Q)Yannick Hanfmann [GER] | 6-4 6-4 | (ch) | 1.35 | 1.8% | 1.8% | 35.1% | 65.0% | 73.0% | 4/5 | 1:16 |
| 7‑Sep‑2020 | Kitzbuhel | Clay | SF | 47 | 303 | Kecmanovic d. (Q)Marc Andrea Huesler [SUI] | 6-2 5-7 6-3 | | 1.18 | 7.3% | 14.7% | 39.4% | 86.0% | 45.5% | 4/7 | 2:19 |
| 7‑Sep‑2020 | Kitzbuhel | Clay | QF | 47 | 79 | Kecmanovic d. (Q)Federico Delbonis [ARG] | 6-4 6-7(5) 7-5 | | 1.28 | 12.9% | 3.0% | 52.5% | 86.8% | 60.4% | 3/3 | 2:33 |
| 7‑Sep‑2020 | Kitzbuhel | Clay | R16 | 47 | 63 | Kecmanovic d. Jordan Thompson [AUS] | 6-2 6-2 | | 2.12 | 13.3% | 2.2% | 64.4% | 82.8% | 62.5% | 1/1 | 1:04 |
| 7‑Sep‑2020 | Kitzbuhel | Clay | R32 | 47 | 34 | Kecmanovic d. (6)Kei Nishikori [JPN] | 4-6 6-4 6-2 | | 1.21 | 4.0% | 5.3% | 48.0% | 66.7% | 53.8% | 1/6 | 1:58 |
| 31‑Aug‑2020 | US Open | Hard | R64 | 47 | 11 | (8)Roberto Bautista Agut [ESP] d. Kecmanovic | 6-3 3-6 6-3 6-4 | | 0.78 | 10.0% | 0.8% | 67.5% | 70.4% | 46.2% | 14/17 | 2:38 |
| 31‑Aug‑2020 | US Open | Hard | R128 | 47 | 80 | Kecmanovic d. Gianluca Mager [ITA] | 6-4 6-4 6-7(6) 3-6 6-2 | | 0.94 | 16.0% | 6.1% | 55.8% | 82.4% | 54.2% | 9/10 | 2:54 |
| 24‑Feb‑2020 | Acapulco | Hard | R16 | 50 | 2 | (1)Rafael Nadal [ESP] d. Kecmanovic | 6-2 7-5 | | 0.71 | 5.8% | 3.8% | 53.8% | 53.6% | 45.8% | 1/6 | 1:35 |
| 24‑Feb‑2020 | Acapulco | Hard | R32 | 50 | 25 | Kecmanovic d. Alex De Minaur [AUS] | 3-6 6-4 6-3 | (ch) | 1.15 | 3.2% | 2.2% | 69.9% | 72.3% | 53.6% | 11/13 | 1:59 |
| 17‑Feb‑2020 | Delray Beach | Hard | R16 | 50 | 44 | (6)Ugo Humbert [FRA] d. Kecmanovic | 6-4 7-6(6) | | 1.08 | 11.1% | 3.2% | 54.0% | 79.4% | 51.7% | 1/4 | 1:42 |
| 17‑Feb‑2020 | Delray Beach | Hard | R32 | 50 | 65 | Kecmanovic d. Jordan Thompson [AUS] | 6-2 0-0 RET | | 3.03 | 5.3% | 5.3% | 47.4% | 100.0% | 70.0% | 0/0 | 0:27 |
| 10‑Feb‑2020 | New York | Hard | SF | 54 | 62 | (8)Kyle Edmund [GBR] d. (6)Kecmanovic | 6-1 6-4 | | 0.74 | 6.1% | 6.1% | 61.2% | 53.3% | 63.2% | 4/7 | 1:11 |
| 10‑Feb‑2020 | New York | Hard | QF | 54 | 43 | (6)Kecmanovic d. (4)Ugo Humbert [FRA] | 3-6 6-2 6-4 | (ch) | 1.05 | 3.8% | 1.3% | 67.1% | 77.4% | 46.2% | 4/5 | 1:48 |
| 10‑Feb‑2020 | New York | Hard | R16 | 54 | 116 | (6)Kecmanovic d. (Q)Paolo Lorenzi [ITA] | 6-3 6-3 | | 1.33 | 5.5% | 1.8% | 47.3% | 80.8% | 51.7% | 2/3 | 1:13 |
| 10‑Feb‑2020 | New York | Hard | R32 | 54 | 70 | (6)Kecmanovic d. Tommy Paul [USA] | 6-4 6-2 | | 1.43 | 3.8% | 0.0% | 62.3% | 75.8% | 50.0% | 3/4 | 1:17 |
| 27‑Jan‑2020 | Newport Beach CH | Hard | R16 | 54 | 186 | Daniel Elahi Galan [COL] d. (3)Kecmanovic | 6-3 6-7(6) 6-3 | | 0.99 | 4.4% | 6.6% | 50.5% | 63.0% | 53.3% | 2/7 | 2:11 |
| 27‑Jan‑2020 | Newport Beach CH | Hard | R32 | 54 | 259 | (3)Kecmanovic d. Yosuke Watanuki [JPN] | 6-1 4-6 6-3 | | 1.42 | 0.0% | 2.7% | 61.3% | 69.6% | 69.0% | 5/7 | 1:42 |
| 20‑Jan‑2020 | Australian Open | Hard | R128 | 54 | 85 | Andreas Seppi [ITA] d. Kecmanovic | 6-4 6-4 7-6(3) | | 0.71 | 6.4% | 0.9% | 59.6% | 66.2% | 50.0% | 5/8 | 2:01 |
| 6‑Jan‑2020 | Doha | Hard | SF | 62 | 23 | (2)Andrey Rublev [RUS] d. Kecmanovic | 6-3 6-1 | (ch) | 0.40 | 0.0% | 2.0% | 60.0% | 46.7% | 50.0% | 2/6 | 0:53 |
| 6‑Jan‑2020 | Doha | Hard | QF | 62 | 70 | Kecmanovic d. (Q)Marton Fucsovics [HUN] | 6-2 6-0 | | 2.29 | 5.1% | 0.0% | 76.9% | 73.3% | 66.7% | 3/4 | 0:55 |
| 6‑Jan‑2020 | Doha | Hard | R16 | 62 | 30 | Kecmanovic d. (3)Jo Wilfried Tsonga [FRA] | 7-6(9) 6-1 | | 1.52 | 14.5% | 6.5% | 61.3% | 89.5% | 54.2% | 0/0 | 1:14 |
| 6‑Jan‑2020 | Doha | Hard | R32 | 62 | 63 | Kecmanovic d. Jordan Thompson [AUS] | 6-4 6-2 | | 1.57 | 0.0% | 1.8% | 54.4% | 74.2% | 65.4% | 0/0 | 1:24 |
