The 2013 Oberstaufen Cup was a professional tennis tournament played on clay courts. It was the 22nd edition of the Oberstaufen Cup, which was part of the 2013 ATP Challenger Tour. It took place in Oberstaufen, Germany between 22 and 28 July 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Jan-Lennard Struff | 105 | 1 | ||
 Argentina | Martín Alund | 110 | 2 | |
 France | Guillaume Rufin | 111 | 3 | |
| France | Marc Gicquel | 130 | 4 | |
 Ukraine | Oleksandr Nedovyesov | 143 | 5 | |
| Peter Gojowczyk | 165 | 6 | ||
| Simon Greul | 166 | 7 | ||
| Bastian Knittel | 176 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
See main article: 2013 Oberstaufen Cup – Singles.
Guillaume Rufin def. Peter Gojowczyk 6–3, 6–4See main article: 2013 Oberstaufen Cup – Doubles.
Philipp Oswald def. Stephan Fransen / 
Artem Sitak 6–1, 3–6, [14–12]
