| Date: | 14–22 July |
| Edition: | 107th |
| Surface: | Clay / outdoor |
| Category: | ATP World Tour 500 |
| Prize Money: | €1,102,500 |
| Draw: | 48S / 16D |
| Location: | Hamburg, Germany |
| Venue: | Am Rothenbaum |
| Champs: |  Fabio Fognini[1] |
| Champd: |  Mariusz Fyrstenberg / Marcin Matkowski[2] |
The 2013 International German Open (also known as the bet–at–home Open – German Tennis Championships 2013 for sponsorship reasons) was a men's tennis tournament played on outdoor red clay courts. It was the 107th edition of the event known that year as the International German Open and was part of the ATP World Tour 500 series of the 2013 ATP World Tour. It took place at the Am Rothenbaum in Hamburg, Germany, from 14 July through 22 July 2013. Twelfth-seeded Fabio Fognini won the singles title.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | Round of 64 | width=85 | Q | width=85 | Q2 | width=85 | Q1 |
| Men's singles[3] | 500 | 300 | 180 | 90 | 45 | 20 | 0 | 10 | 4 | 0 | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Men's doubles | 0 |
| width=130 bgcolor=dfe2e9 | Event | width=80 bgcolor=lime | W | width=85 bgcolor=thistle | F | width=85 bgcolor=ffff00 | SF | width=85 bgcolor=ffebcd | QF | width=85 bgcolor=afeeee | Round of 16 | width=85 bgcolor=afeeee | Round of 32 | width=85 bgcolor=afeeee | Round of 64 | width=85 | Q2 | width=85 | Q1 |
| style=background:#ededed | Men's singles | €251,200 | €114,510 | €53,340 | €25,460 | €12,390 | €6,600 | €3,840 | €710 | €370 | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| style=background:#ededed | Men's doubles | €78,360 | €35,360 | €16,680 | €8,060 | €4,120 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Roger Federer | 5 | 1 | ||
| Tommy Haas | 11 | 2 | ||
 Spain | Nicolás Almagro | 16 | 3 | |
| Poland | Jerzy Janowicz | 17 | 4 | |
 Argentina | Juan Mónaco | 20 | 5 | |
| Italy | Andreas Seppi | 23 | 6 | |
 Ukraine | Alexandr Dolgopolov | 24 | 7 | |
 France | Jérémy Chardy | 26 | 8 | |
| France | Benoît Paire | 27 | 9 | |
| Spain | Tommy Robredo | 28 | 10 | |
| Spain | Feliciano López | 30 | 11 | |
| Italy | Fabio Fognini | 31 | 12 | |
 Russian Federation | Mikhail Youzhny | 32 | 13 | |
| Spain | Fernando Verdasco | 35 | 14 | |
| Ernests Gulbis | 36 | 15 | ||
 Slovakia | Martin Kližan | 38 | 16 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Jerzy Janowicz (right arm injury)| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Spain | Marcel Granollers | Spain | Marc López | 7 | 1 | |
 Austria | Alexander Peya |  Brazil | Bruno Soares | 15 | 2 | |
| Spain | David Marrero | Spain | Fernando Verdasco | 35 | 3 | |
| Austria | Julian Knowle |  Sweden | Robert Lindstedt | 42 | 4 |
The following pairs received wildcards into the doubles main draw:
David Marrero (right calf injury) Benoît Paire (elbow injury)See main article: 2013 International German Open – Singles.
Fabio Fognini defeated Federico Delbonis, 4–6, 7–6(10–8), 6–2See main article: 2013 International German Open – Doubles.
Mariusz Fyrstenberg / Marcin Matkowski defeated Alexander Peya / Bruno Soares, 3–6, 6–1, [10–8]
