1999 WTA Tier I Series
| Details | |
|---|---|
| Duration | February 1 – October 24 |
| Edition | 10th |
| Tournaments | 9 |
| Achievements (singles) | |
| Most titles | Martina Hingis (4) |
| Most finals | Martina Hingis (5) |
← 1998 2000 → | |
The WTA Tier I events are part of the elite tour for professional women's tennis organised by the WTA called the WTA Tour.