The 2014 Düsseldorf Open was a men's tennis tournament played on clay courts. It was the second edition of the Düsseldorf Open as an ATP World Tour 250 series event on the 2014 ATP World Tour. It took place at the Rochusclub in Düsseldorf, Germany, from May 18 through May 24, 2014.
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Singles | 250 | 150 | 90 | 45 | 20 | 0 | 12 | 6 | 0 | 0 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Doubles | 0 |
| Event | W | F | SF | QF | Round of 16 | Round of 32 | width=85 | Q3 | width=85 | Q2 | width=85 | Q1 |
| Singles | €77,315 | €40,720 | €22,060 | €12,565 | €7,405 | €4,385 | €710 | €340 | ||||
| Doubles * | €23,500 | €12,350 | €6,690 | €3,830 | €2,240 |
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Philipp Kohlschreiber | 29 | 1 | ||
 Spain | Marcel Granollers | 31 | 2 | |
 Italy | Andreas Seppi | 34 | 3 | |
| João Sousa | 41 | 4 | ||
| Lu Yen-hsun | 48 | 5 | ||
 Finland | Jarkko Nieminen | 51 | 6 | |
| Ivo Karlović | 52 | 7 | ||
| Igor Sijsling | 53 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Treat Huey |  United Kingdom | Dominic Inglot | 42 | 1 | ||
| United Kingdom | Jamie Murray |  Australia | John Peers | 67 | 2 | |
 Mexico | Santiago González | Scott Lipsky | 75 | 3 | ||
 Poland | Tomasz Bednarek |  Czech Republic | Lukáš Dlouhý | 99 | 4 |
The following pairs received wildcards into the doubles main draw:
Santiago González / 
Scott Lipsky def. Martin Emmrich / Christopher Kas, 7–5, 4–6, [10–3]
