29‑Jul‑2024 | Paris Olympics | Clay | R32 | 70 | 45 | Koepfer d. Matteo Arnaldi [ITA] | 3-6 6-2 6-1 | | 1.46 | 3.0% | 1.5% | 64.2% | 69.8% | 66.7% | 4/6 | |
18‑Mar‑2024 | Miami Masters | Hard | R128 | 50 | 51 | Koepfer d. Marcos Giron [USA] | 4-6 6-1 6-4 | | 1.18 | 9.1% | 1.1% | 73.9% | 67.7% | 69.6% | 4/5 | 1:49 |
4‑Mar‑2024 | Indian Wells Masters | Hard | R128 | 49 | 51 | Alexander Shevchenko [KAZ] d. Koepfer | 6-3 1-6 7-6(3) | | 0.96 | 7.4% | 3.2% | 59.6% | 67.9% | 44.7% | 7/10 | 2:09 |
26‑Feb‑2024 | Acapulco | Hard | R16 | 58 | 16 | Koepfer d. (8)Frances Tiafoe [USA] | 6-4 5-7 6-1 | | 1.37 | 12.9% | 3.5% | 60.0% | 66.7% | 67.6% | 7/10 | 2:25 |
26‑Feb‑2024 | Acapulco | Hard | R32 | 58 | 146 | Koepfer d. (Q)Terence Atmane [FRA] | 6-4 4-6 6-0 | | 1.40 | 1.4% | 2.8% | 52.8% | 73.7% | 55.9% | 2/5 | 2:21 |
17‑Jan‑2022 | Australian Open | Hard | R128 | 53 | 108 | Koepfer d. Carlos Taberner [ESP] | 6-1 3-6 6-4 6-1 | | 1.52 | 8.0% | 5.7% | 68.2% | 78.3% | 50.0% | 2/4 | 2:27 |
24‑Jul‑2021 | Tokyo Olympics | Hard | R32 | 57 | 190 | Koepfer d. Max Purcell [AUS] | 6-3 6-0 | | | | | | | | | |
28‑Sep‑2020 | Roland Garros | Clay | R128 | 61 | 126 | Koepfer d. (WC)Antoine Hoang [FRA] | 6-2 3-6 6-1 6-1 | | 1.56 | 2.2% | 3.3% | 80.0% | 69.4% | 55.6% | 2/4 | 2:04 |
21‑Sep‑2020 | Hamburg | Clay | R32 | 66 | 50 | (SE)Koepfer d. Yoshihito Nishioka [JPN] | 7-6(0) 4-6 6-1 | | 1.02 | 7.9% | 0.8% | 61.4% | 62.8% | 55.1% | 16/19 | 2:29 |
14‑Sep‑2020 | Rome Masters | Clay | R16 | 97 | 249 | (Q)Koepfer d. (Q)Lorenzo Musetti [ITA] | 6-4 6-0 | (ch) | 1.55 | 3.8% | 1.9% | 55.8% | 75.9% | 60.9% | 5/5 | 1:10 |
6‑Mar‑2020 | Davis Cup QLS R1: GER vs BLR | Hard | RR | 92 | | Koepfer d. Daniil Ostapenkov [BLR] | 6-0 6-2 | | 2.33 | 7.3% | 2.4% | 56.1% | 78.3% | 66.7% | 2/2 | 0:46 |
26‑Aug‑2019 | US Open | Hard | R32 | 118 | 18 | (Q)Koepfer d. (17)Nikoloz Basilashvili [GEO] | 6-3 7-6(5) 4-6 6-1 | | 1.12 | 10.4% | 0.8% | 65.6% | 68.3% | 48.8% | 3/7 | 2:40 |
1‑Jul‑2019 | Wimbledon | Grass | R128 | 130 | 52 | Koepfer d. Filip Krajinovic [SRB] | 6-3 4-6 7-6(9) 6-1 | | 1.08 | 8.8% | 4.1% | 56.8% | 82.1% | 40.6% | 8/10 | 2:35 |