The 2019 Sparkassen Open was a professional tennis tournament played on clay courts. It was the 26th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Braunschweig, Germany between 8 and 13 July 2019.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Norway | Casper Ruud | 62 | 1 | |
 Bolivia, Plurination;al State of | Hugo Dellien | 83 | 2 | |
| Henri Laaksonen | 97 | 3 | ||
 Italy | Stefano Travaglia | 102 | 4 | |
 Poland | Kamil Majchrzak | 108 | 5 | |
 Brazil | Thiago Monteiro | 113 | 6 | |
 Sweden | Elias Ymer | 118 | 7 | |
 Spain | Pedro Martínez | 126 | 8 | |
 Czech Republic | Lukáš Rosol | 129 | 9 | |
 Austria | Sebastian Ofner | 140 | 10 | |
| Italy | Gianluca Mager | 142 | 11 | |
 Belgium | Kimmer Coppejans | 144 | 12 | |
| Rudolf Molleker | 147 | 13 | ||
| Oscar Otte | 150 | 15 | ||
 Argentina | Marco Trungelliti | 162 | 16 |
The following players received wildcards into the singles main draw:
The following players received entry into the singles main draw as alternates:
The following players received entry into the singles main draw using their ITF World Tennis Ranking:
The following players received entry from the qualifying draw:
Geoffrey BlancaneauxThe following player received entry as a lucky loser:
See main article: 2019 Sparkassen Open – Singles.
Thiago Monteiro def. Tobias Kamke 7–6(8–6), 6–1.See main article: 2019 Sparkassen Open – Doubles.
Simone Bolelli / Guillermo Durán def. 
Nathaniel Lammons / Antonio Šančić 6–3, 6–2.
