|
| R32 | 2021 M25 Villers Les Nancy, Wk. 45 | Hard | L | Antoine Monaco | 6-1 6-7(5) 6-2 | [H2H] |
|
| R32 | 2021 M25 Sarreguemines, Wk. 43 | Carpet | L | Calvin Hemery | 6-4 6-2 | [H2H] |
|
| R32 | 2021 M25 Hamburg, Wk. 42 | Hard | L | Henri Squire | 6-2 6-2 | [H2H] |
|
| F | 2021 M25 Hamburg, Wk. 42 | Hard | W | Ben Jones | 6-4 6-4 | [H2H] |
| QF | 2021 M25 Hamburg, Wk. 42 | Hard | W | Sean Marcel Saal | 6-1 6-2 | [H2H] |
|
| R32 | 2021 M15 Forbach, Wk. 39 | Carpet | L | Arthur Reymond | 6-1 6-7(4) 6-4 | [H2H] |
|
| R16 | 2021 M25 Pardubice, Wk. 38 | Clay | L | Robin Stanek | 6-2 6-4 | [H2H] |
| R32 | 2021 M25 Pardubice, Wk. 38 | Clay | W | Pawel Cias | 6-4 6-3 | [H2H] |
|
| R32 | 2021 M15 Allershausen, Wk. 35 | Clay | L | Niklas Schell | 3-6 6-2 6-3 | [H2H] |
|
| R32 | 2021 M25 Trier, Wk. 34 | Clay | L | Tim Handel | 2-6 6-1 7-6(2) | [H2H] |
|
| R16 | 2021 M15 Ueberlingen, Wk. 33 | Clay | L | Louis Wessels | 6-4 6-3 | [H2H] |
| R32 | 2021 M15 Ueberlingen, Wk. 33 | Clay | W | Constantin Bittoun Kouzmine | 6-4 6-0 | [H2H] |
|
| QF | 2021 M25 Frankfurt am Main, Wk. 32 | Clay | L | Taiyo Yamanaka | 7-6(1) 6-4 | [H2H] |
|
| R32 | 2021 M15 Parnu, Wk. 31 | Clay | L | Vladimir Ivanov | 7-5 1-6 6-3 | [H2H] |
|
| QF | 2021 M25 Marburg, Wk. 27 | Clay | L | Ryan Nijboer | 4-6 6-3 6-1 | [H2H] |
| R16 | 2021 M25 Marburg, Wk. 27 | Clay | W | Neo Niedner | 6-2 6-1 | [H2H] |
| R32 | 2021 M25 Marburg, Wk. 27 | Clay | W | Daniel Cukierman | 6-4 6-4 | [H2H] |
|
| F | 2021 M25 Marburg, Wk. 27 | Clay | W | Raphael Collignon | 7-6(4) 6-3 | [H2H] |
| QF | 2021 M25 Marburg, Wk. 27 | Clay | W | Christopher Patzanovsky | 6-1 6-3 | [H2H] |
|
| F | 2021 M15 Heraklion, Wk. 20 | Hard | L | Sergis Kyratzis | 2-6 0-2 ret. | [H2H] |
| SF | 2021 M15 Heraklion, Wk. 20 | Hard | W | Tom Gentzsch | 6-0 6-3 | [H2H] |
|
| QF | 2021 M15 Troisdorf, Wk. 19 | Clay | L | Yannik Steinegger | 6-4 6-2 | [H2H] |
|
| QF | 2021 M25 Meerbusch, Wk. 15 | Clay | L | Alexander Erler | 6-1 6-4 | [H2H] |
| R16 | 2021 M25 Meerbusch, Wk. 15 | Clay | W | Markus Eriksson | 6-3 6-1 | [H2H] |
| R32 | 2021 M25 Meerbusch, Wk. 15 | Clay | W | Pietro Rondoni | 6-3 4-6 6-4 | [H2H] |
|
| F | 2021 M25 Meerbusch, Wk. 15 | Clay | W | Mats Rosenkranz | 6-2 6-2 | [H2H] |
| SF | 2021 M25 Meerbusch, Wk. 15 | Clay | W | Hendrik Jebens | 7-5 6-1 | [H2H] |
| QF | 2021 M25 Meerbusch, Wk. 15 | Clay | W | Jannik Rother | 6-2 6-2 | [H2H] |
|
| QF | 2021 M25 Biel, Wk. 13 | Hard | L | Jakub Paul | 6-4 6-1 | [H2H] |
|
| F | 2021 M15 Rovinj, Wk. 11 | Clay | L | Federico Arnaboldi | 6-2 6-2 | [H2H] |
