| Details | |
|---|---|
| Duration | 26 January 1998 – 4 January 1999 |
| Edition | 21st |
| Tournaments | 114 |
| Achievements (singles) | |
← 1997 1999 → | |
The ATP Challenger Series is the second tier tour for professional tennis organised by the Association of Tennis Professionals (ATP). The 1998 ATP Challenger Series calendar comprised 114 tournaments, with prize money ranging from $25,000 up to $125,000.[1][2]