WTA and ATP rankings on - 28.12.1998
- Searching
- Ranking - singles
- Ranking - doubles
- Race - singles
| Rank | Move | Player name | Country | Points |
| 3. | - |
Hingis Martina | Switzerland | 2816 |
| 58. | - |
Schnyder Patty | Switzerland | 623 |
| 132. | - |
Gagliardi Emmanuelle | Switzerland | 203 |
| 245. | - |
Tricerri Alienor | Switzerland | 76 |
| 355. | - |
Vavrinec Miroslava | Switzerland | 36 |
| 415. | - |
Losey Marylene | Switzerland | 25 |
| 588. | - |
Asensio Diana | Switzerland | 11 |
| 634. | - |
Corazza Sabrina | Switzerland | 9 |
|1-50|
- Betting ranking
| Panshina Varvara | +2498 |
| Lee Carol Young Suh | +2079 |
| Mdlulwa Wozuko | +1596 |
| Moyano Luciana | +1425 |
| Bublik Alexander | +1400 |
| Hodkin Sean | -1413 |
| Kis Balazs Rafael | -1298 |
| Heinzova Izabela | -1244 |
| Mannarino Adrian | -1168 |
| Yoshikawa Yusuke | -1167 |
This week's tournaments
| Main tournaments | ||||
| Queen's Club | 2 | |||
| Eastbourne | 18 | |||
| Mallorca | 16 | |||
| Bad Homburg WTA | 13 | |||
| Eastbourne | 20 | |||
| Nottingham | 1 | |||
| Lower level tournaments | ||||
| Milan challenger | 23 | |||
| Lima 2 challenger | 23 | |||
| UTR Pro Tennis Series 3 | 48 | |||
| UTR Pro Tennis Series 5 | 33 | |||
| UTR Pro Tennis Series 9 | 21 | |||
| Palma del Rio ITF | 8 | |||
| Perigueux ITF | 13 | |||
| Taipei 3 ITF | 8 | |||
| Tarvisio ITF | 20 | |||
| Wichita ITF | 1 | |||
| UTR Pro Tennis Series 5 | 31 | |||
| UTR Pro Tennis Series 9 | 6 | |||
| Alkmaar ITF | 16 | |||
| Kayseri 5 ITF | 14 | |||
| Kursumlijska Banja 10 ITF | 12 | |||
| Maanshan 7 ITF | 17 | |||
| Monastir 41 ITF | 16 | |||
| Rancho Santa Fe ITF | 1 | |||
| Sapporo 2 ITF | 16 | |||
| UTR Pro Match Series | 37 | |||
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