| 1999 WTA German Open | |
|---|---|
| Date | 10 – 16 May | 
| Edition | 30th | 
| Category | Tier I | 
| Draw | 56S / 28D | 
| Prize money | $150,000 | 
| Surface | Clay / outdoor | 
| Location | Berlin, Germany | 
| Venue | Rot-Weiss Tennis Club | 
| Champions | |
| Singles | |
| .svg.png.webp) Martina Hingis | |
| Doubles | |
|  Alexandra Fusai /  Nathalie Tauziat | |
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.
Finals
Singles
.svg.png.webp) Martina Hingis defeated
 Martina Hingis defeated  Julie Halard-Decugis, 6–0, 6–1
 Julie Halard-Decugis, 6–0, 6–1
- It was Hingis' 7th title of the year and the 46th of her career.
Doubles
 Alexandra Fusai /
 Alexandra Fusai /  Nathalie Tauziat defeated
 Nathalie Tauziat defeated  Jana Novotná /
 Jana Novotná /  Patricia Tarabini, 6–3, 7–5
 Patricia Tarabini, 6–3, 7–5
Entrants
Seeds
| Country | Player | Rank | Seed | 
|---|---|---|---|
| .svg.png.webp) SUI | Martina Hingis | 1 | 1 | 
|  CZE | Jana Novotná | 4 | 2 | 
|  GER | Steffi Graf | 6 | 3 | 
|  ESP | Arantxa Sánchez Vicario | 7 | 4 | 
|  FRA | Nathalie Tauziat | 9 | 6 | 
|  USA | Serena Williams | 11 | 7 | 
| .svg.png.webp) SUI | Patty Schnyder | 12 | 8 | 
|  RUS | Anna Kournikova | 15 | 9 | 
|  RSA | Amanda Coetzer | 16 | 10 | 
| .svg.png.webp) BEL | Dominique Van Roost | 14 | 11 | 
|  FRA | Amélie Mauresmo | 10 | 12 | 
|  ROU | Irina Spîrlea | 18 | 13 | 
|  ESP | Conchita Martínez | 17 | 14 | 
|  BLR | Natasha Zvereva | 19 | 15 | 
|  AUT | Barbara Schett | 20 | 16 | 
Other entrants
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 Germana Di Natale
 Miriam Schnitzer Miriam Schnitzer
 Sandra Klösel Sandra Klösel
 Sandra Kleinová Sandra Kleinová
 Sandra Cacic Sandra Cacic
 Anca Barna Anca Barna
.svg.png.webp) Sandra Načuk Sandra Načuk
.svg.png.webp) Emmanuelle Gagliardi Emmanuelle Gagliardi
The 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:

