| Loss | 0–1 | [2016 Porsche Tennis Grand Prix – Singles|] | Stuttgart Open, Germany | Premier | Clay | dts|Jul 2016
Doubles: 25 (16 titles, 9 runner-ups)| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score | | Loss | 0–1 | [2015 Grand Prix SAR La Princesse Lalla Meryem – Doubles|] | Morocco Open, Morocco | International | Clay | 
ITF Circuit finalsSingles: 28 (14 titles, 14 runner-ups)| Result | W–L | Date | Tournament | Tier | Surface | Opponent | Score | | Loss | 0–1 | | ITF Lagos, Nigeria | 25,000 | Hard | dts|Nov 2006
Doubles: 32 (20 titles, 12 runner-ups)| Result | W–L | Date | Tournament | Tier | Surface | Partner | Opponents | Score | | Win | 1–0 | | ITF Darmstadt, Germany | 25,000 | Clay | 
Wins over top-10 playersSiegemund has a 13–25 record against players who were, at the time the match was played, ranked in the top 10.
| Season | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | Total | | Wins | 1 | 3 | 5 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 3 | 13 |
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