The 2013 Power Horse Cup was a men's tennis tournament played on clay courts. It was the first edition of the Power Horse Cup as an ATP World Tour 250 series event on the 2013 ATP World Tour and replaced the World Team Cup, a team event previously held at the same venue. It took place at the Rochusclub in Düsseldorf, Germany, from May 19 through May 25, 2013.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
 Serbia | Janko Tipsarević | 10 | 1 | |
| Tommy Haas | 14 | 2 | ||
 Argentina | Juan Mónaco | 18 | 3 | |
| Philipp Kohlschreiber | 22 | 4 | ||
 Czech Republic | Lukáš Rosol | 33 | 5 | |
 Finland | Jarkko Nieminen | 41 | 6 | |
| Serbia | Viktor Troicki | 42 | 7 | |
 Russian Federation | Nikolay Davydenko | 44 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
The following player received entry as a lucky loser:
Nicolás Almagro Dmitry Tursunov (left hamstring injury) Mikhail Youzhny| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
 United Kingdom | Colin Fleming | United Kingdom | Jonathan Marray | 44 | 1 | |
 Austria | Julian Knowle |  Slovakia | Filip Polášek | 61 | 2 | |
| Treat Conrad Huey | United Kingdom | Dominic Inglot | 70 | 3 | ||
| Frederik Nielsen |  Brazil | André Sá | 107 | 4 |
The following pairs received wildcards into the doubles main draw:
Juan Mónaco def. Jarkko Nieminen, 6–4, 6–3 Dominic Inglot, 7–5, 6–2
