Lasse Poertner
- Country
- Germany
- Date of birth
- 2005-11-22
- Plays
- right-handed
- Ranking ATP
- 1400 · 6 points
- Ranking ATP (doubles)
- 1605 · 13 points
- Season 2026
- 2–2
Recent matches
| Date | Tournament | Round | Opponent | Score | Result |
|---|---|---|---|---|---|
| 2026-09-29 | Fayetteville, AR | R16 | Noah Schlagenhauf | 4-6 3-6 | lost |
| 2026-09-28 | Fayetteville, AR | R32 | Kabeer Kapasi | 6-2 6-1 | won |
| 2026-06-01 | Neckarcup 2.0 | Q2 | Sander Jong | 3-6 5-7 | lost |
| 2026-06-01 | Neckarcup 2.0 | Q1 | Florian Broska | 6-4 6-4 | won |