Spieler / Teilnehmer 2023
- Country: Switzerland
- Current Ranking: 96 | Career High: 88
- Age: 21 | Turned Pro: 2020
- Left-Handed | Two-Handed Backhand
- Birthplace: Grosshochstetten, Switzerland
- Coach: Dieter Kindlmann
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- Country: Germany
- Current Ranking: 106 | Career High: 45
- Age: 28 | Turned Pro: 2015
- Left-Handed | Two-Handed Backhand
- Birthplace: Nuremberg, Germany
- Coach: Gerald Radovici
- Country: USA
- Current Ranking: 113 | Career High: 31
- Age: 26 | Turned Pro: 2019
- Right-Handed | Two-Handed Backhand
- Birthplace: Paris, France
- Coach: Alexandre Sidorenko, Juanjo Clement, Andrew Marie
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- Country: Bosnia and Herzegovina
- Current Ranking: 149 | Career High: 23
- Age: 31 | Turned Pro: 2011
- Right-Handed | Two-Handed Backhand
- Birthplace: Sarajevo, Bosnia and Herzegovina
- Coach: Antonio Sancic
- Country: Great Britain
- Current Ranking: 152 | Career High: 126
- Age: 27 | Turned Pro: Unknown
- Right-Handed | Two-Handed Backhand
- Birthplace: Koblenz, Germany
- Coach: Andrzej Choinski, Paweł Strauss
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- Country: Ukraine
- Current Ranking: 166 | Career High: 156
- Age: 26 | Turned Pro: Unknown
- Right-Handed | Two-Handed Backhand
- Birthplace: Kremenchuk, Ukraine
- Coach: Unknown
- Country: Switzerland
- Current Ranking: 174 | Career High: 47
- Age: 27 | Turned Pro: 2016
- Left-Handed | Two-Handed Backhand
- Birthplace: Zurich, Switzerland
- Coach: Thiemo Scharfenberger, Juerg Hüsler
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- Country: France
- Current Ranking: 178 | Career High: 154
- Age: 21 | Turned Pro: 2020
- Right-Handed | Two-Handed Backhand
- Birthplace: Metz, France
- Coach: Thierry Tulasne
10 Lukas Klein |Slovakia| ATP 181| Age: 25 |Right-Handed |Two-Handed Backhand
11 Rudolf Molleker|Germany| ATP 218| Age: 22|Right-Handed |Two-Handed Backhand
12 Oscar Otte |Germany| ATP 226| Age: 30 |Right-Handed |Two-Handed Backhand
13 Nerman Fatic |Bosnia and Herzegovina| ATP 228| Age: 29|Right-Handed |Two-Handed Backhand
14 Mate Valkusz |Hungary| ATP 232| Age: 25 |Right-Handed |Two-Handed Backhand
15 Denis Yevseyev |Ukraine| ATP 240| Age: 30 |Right-Handed |Two-Handed Backhand
16 Oleksii Krutykh |Ukraine| ATP 243| Age: 23 |Right-Handed |Two-Handed Backhand
17 Adrian Andreev |Bulgaria| ATP 251| Age: 22 |Right-Handed |Two-Handed Backhand
18 Michael Geerts |Belgium| ATP 268| Age: 28 |Right-Handed |Two-Handed Backhand
19 Henri Squire |Germany| ATP 271| Age: 23|Right-Handed |Two-Handed Backhand
20 Timo Stodder |Germany| ATP 298| Age: 27|Right-Handed |Two-Handed Backhand
ALT Mathias Bourgue |France| ATP 255| Age: 29|Right-Handed |Two-Handed Backhand
ALT Alibek Kachmazov | ATP 273| Age: 21|Right-Handed |Two-Handed Backhand
Q Joao Sousa |Portugal| ATP 278| Age: 34|Right-Handed |Two-Handed Backhand
Q Antoine Bellier|Switzerland| ATP 326| Age: 27|Left-Handed |One-Handed Backhand
Q Andrew Paulson|Czech Rubublic| ATP 327| Age: 21|Right-Handed |Two-Handed Backhand
Q Louis Wessels|Germany| ATP 342| Age: 25|Right-Handed |Two-Handed Backhand
Q Kacper Zuk|Poland| ATP 371| Age: 24|Right-Handed |Two-Handed Backhand
Q Mats Rosenkranz|Germany| ATP 430| Age: 25|Left-Handed |Two-Handed Backhand
LL Marius Copil|Romania| ATP 324| Age: 33|Right-Handed |One-Handed Backhand
WC Marko Topo |Germany| ATP 380| Age: 20|Right-Handed |Two-Handed Backhand
WC Daniel Masur |Germany| ATP 437| Age: 28|Right-Handed |Two-Handed Backhand
WC Max Rehberg |Germany| ATP 631| Age: 20|Right-Handed |Two-Handed Backhand
JA Mili Poljicak |Croatia| ATP 752| Age: 19|Right-Handed |Two-Handed Backhand