| Details | |
|---|---|
| Duration | March 14 – May 9 |
| Tournaments | 2 |
| Achievements (singles) | |
| Most tournament titles |  Steffi Graf (2) |
| Most tournament finals | Steffi Graf (2) |
1989 → | |
The table below shows the 1988 WTA Tier I Series schedule.
| Details | |
|---|---|
| Duration | March 14 – May 9 |
| Tournaments | 2 |
| Achievements (singles) | |
| Most tournament titles | Steffi Graf (2) |
| Most tournament finals | Steffi Graf (2) |
1989 → | |
The table below shows the 1988 WTA Tier I Series schedule.