The 1999 Open Gaz de France was a women's tennis tournament played on indoor hardcourts at the Stade Pierre de Coubertin in Paris in France that was part of Tier II of the 1999 WTA Tour. It was the seventh edition of the tournament and was held from 22 February until 28 February 1999. Unseeded Serena Williams won the singles title and earned $80,000 first-prize money. It was her first WTA singles title. On the same day her sister Venus won the IGA Superthrift Tennis Classic tournament, making them the first sisters to win WTA events in the same week.[1] [2] [3]
See main article: 1999 Open Gaz de France – Singles. 
Serena Williams defeated 
Amélie Mauresmo, 6–2, 3–6, 7–6(7–4)
See main article: 1999 Open Gaz de France – Doubles. Irina Spîrlea / Caroline Vis defeated 
Elena Likhovtseva / 
Ai Sugiyama, 7–5, 3–6, 6–3
| Country | Player | Rank | Seed | |
|---|---|---|---|---|
| Martina Hingis | 1 | 1 | ||
| France | Nathalie Tauziat | 9 | 2 | |
 Belgium | Dominique Van Roost | 11 | 3 | |
 Romania | Irina Spîrlea | 15 | 4 | |
| France | Sandrine Testud | 14 | 5 | |
| France | Amélie Mauresmo | 18 | 6 | |
| France | Julie Halard-Decugis | 21 | 7 | |
| Russian Federation | Elena Likhovtseva | 22 | 8 |
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:
The following players received entry as lucky losers:
The following players received entry from the doubles qualifying draw:
