The 1999 German Open was a women's tennis event that was played in Berlin, Germany from 10 May to 16 May 1999. It was one of two Tier I events that took place on red clay in the build-up to the second Grand Slam of the year, the French Open. First-seeded Martina Hingis won the singles title and earned $150,000 first-prize money.
See main article: 1999 WTA German Open – Singles. Martina Hingis defeated 
Julie Halard-Decugis, 6–0, 6–1
See main article: 1999 WTA German Open – Doubles. Alexandra Fusai / Nathalie Tauziat defeated 
Jana Novotná / 
Patricia Tarabini, 6–3, 7–5
| Country | Player | Rank | Seed |
|---|---|---|---|
| 1 | 1 | ||
| Czech Republic | 4 | 2 | |
| Steffi Graf | 6 | 3 | |
 Spain | 7 | 4 | |
| France | 9 | 6 | |
| 11 | 7 | ||
| Patty Schnyder | 12 | 8 | |
 Russian Federation | 15 | 9 | |
| Amanda Coetzer | 16 | 10 | |
 Belgium | Dominique Van Roost | 14 | 11 |
| France | Amélie Mauresmo | 10 | 12 |
 Romania | Irina Spîrlea | 18 | 13 |
| Spain | Conchita Martínez | 17 | 14 |
 Belarus | Natasha Zvereva | 19 | 15 |
 Austria | Barbara Schett | 20 | 16 |
The following players received wildcards into the singles main draw:
The following players received wildcards into the doubles main draw:
The following players received entry from the singles qualifying draw:
Germana Di Natale Sandra Kleinová
Sandra CacicThe following players received entry as lucky losers:
The following players received entry from the doubles qualifying draw:
The following players received entry as lucky losers: