| 5‑Mar‑2025 | Indian Wells Masters | Hard | R128 | 75 | 52 | Oconnell d. Roberto Carballes Baena [ESP] | 6-3 0-6 6-1 | | 1.08 | 3.2% | 4.8% | 64.5% | 62.5% | 54.5% | 5/8 | 1:56 |
| 24‑Feb‑2025 | Dubai | Hard | R32 | 75 | 16 | (Q)Oconnell d. (6)Grigor Dimitrov [BUL] | 6-0 0-0 RET | | 2.27 | 11.8% | 0.0% | 52.9% | 77.8% | 62.5% | 0/0 | 0:26 |
| 4‑Nov‑2024 | Belgrade | Hard | R16 | 71 | 93 | Oconnell d. Daniel Altmaier [GER] | 6-3 6-1 | | 1.95 | 4.0% | 0.0% | 60.0% | 80.0% | 65.0% | 1/1 | 1:18 |
| 4‑Nov‑2024 | Belgrade | Hard | R32 | 71 | 53 | Oconnell d. Miomir Kecmanovic [SRB] | 6-1 6-1 | | 1.88 | 17.0% | 4.3% | 63.8% | 83.3% | 47.1% | 5/5 | 1:02 |
| 15‑Jan‑2024 | Australian Open | Hard | R128 | 68 | 86 | Oconnell d. Cristian Garin [CHI] | 3-6 7-5 4-6 6-1 7-5 | (ch) | 1.06 | 10.4% | 2.9% | 56.1% | 75.3% | 43.4% | 12/17 | 4:21 |
| 8‑Jan‑2024 | Adelaide | Hard | R16 | 71 | 48 | (WC)Oconnell d. Alexander Shevchenko [KAZ] | 6-3 6-1 | | 2.15 | 26.7% | 2.2% | 62.2% | 89.3% | 58.8% | 0/0 | 1:00 |
| 6‑Nov‑2023 | Sofia | Hard | R32 | 66 | 107 | Oconnell d. Hamad Medjedovic [SRB] | 6-7(3) 6-1 7-6(2) | | 1.25 | 13.8% | 0.9% | 65.1% | 77.5% | 57.9% | 4/4 | 2:36 |
| 12‑Jun‑2023 | Stuttgart | Grass | R32 | 74 | 59 | Oconnell d. Daniel Altmaier [GER] | 6-3 6-1 | (ch) | 2.85 | 10.3% | 0.0% | 59.0% | 91.3% | 68.8% | 0/0 | 0:56 |
| 22‑May‑2023 | Geneva | Clay | R16 | 85 | 37 | Oconnell d. (7)Bernabe Zapata Miralles [ESP] | 6-0 3-0 RET | | 3.38 | 20.0% | 0.0% | 60.0% | 75.0% | 87.5% | 0/0 | 0:36 |
| 22‑May‑2023 | Geneva | Clay | R32 | 85 | 307 | Oconnell d. (Q)Nino Serdarusic [CRO] | 7-6(5) 6-7(1) 6-1 | | 1.21 | 11.7% | 0.0% | 53.4% | 74.5% | 66.7% | 3/3 | 2:49 |
| 3‑Apr‑2023 | Marrakech | Clay | R16 | 87 | 31 | Oconnell d. (3)Botic Van De Zandschulp [NED] | 6-7(8) 6-4 6-0 | (ch) | 1.17 | 3.6% | 5.5% | 59.1% | 66.2% | 44.4% | 9/12 | 2:41 |
| 20‑Feb‑2023 | Doha | Hard | R32 | 94 | 154 | Oconnell d. (WC)Fernando Verdasco [ESP] | 6-1 3-6 6-0 | | 1.38 | 6.9% | 1.4% | 68.1% | 61.2% | 69.6% | 3/4 | 1:42 |
| 17‑Jan‑2022 | Australian Open | Hard | R128 | 175 | 67 | (WC)Oconnell d. Hugo Gaston [FRA] | 7-6(4) 6-0 4-6 6-1 | | 1.31 | 3.7% | 3.7% | 68.8% | 70.7% | 55.9% | 4/7 | 2:35 |
| 10‑Jan‑2022 | Sydney | Hard | R32 | 173 | 95 | (Q)Sebastian Baez [ARG] d. (Q)Oconnell | 6-2 1-6 7-6(4) | | 0.94 | 5.5% | 1.1% | 67.0% | 62.3% | 56.7% | 1/4 | 2:14 |
| 3‑Jan‑2022 | Melbourne | Hard | R32 | 175 | 75 | Jordan Thompson [AUS] d. (WC)Oconnell | 1-6 7-5 6-4 | | 0.89 | 4.8% | 1.0% | 50.0% | 69.2% | 53.8% | 11/14 | 2:20 |
| 8‑Feb‑2021 | Australian Open | Hard | R128 | 121 | 37 | (WC)Oconnell d. Jan Lennard Struff [GER] | 7-6(2) 7-6(5) 6-1 | | 1.22 | 9.3% | 2.8% | 58.3% | 87.3% | 51.1% | 6/6 | 2:02 |
| 1‑Feb‑2021 | Great Ocean Road Open | Hard | R64 | 121 | 68 | Oconnell d. Dominik Koepfer [GER] | 5-7 6-4 6-1 | | 1.11 | 10.4% | 1.0% | 63.5% | 73.8% | 42.9% | 9/12 | 1:56 |
| 20‑Jan‑2020 | Australian Open | Hard | R128 | 115 | 16 | (17)Andrey Rublev [RUS] d. (WC)Oconnell | 6-3 0-6 6-4 7-6(5) | (ch) | 0.87 | 11.2% | 2.2% | 63.4% | 74.1% | 44.9% | 11/15 | 2:15 |