WTA and ATP rankings on - 28.12.1998
- Searching
- Ranking - singles
- Ranking - doubles
- Race - singles
| Rank | Move | Player name | Country | Points |
| 12. | - |
Sugiyama Ai | Japan | 1864 |
| 49. | - |
Smith Nana | Japan | 704 |
| 61. | - |
Hiraki Rika | Japan | 592 |
| 65. | - |
Yoshida Yuka | Japan | 537 |
| 115. | - |
Saeki Miho | Japan | 239 |
| 187. | - |
Inoue Maiko | Japan | 122 |
| 199. | - |
Inoue Haruka | Japan | 110 |
| 208. | - |
Asagoe Shinobu | Japan | 99 |
| 230. | - |
Nagatomi Keiko | Japan | 85 |
| 234. | - |
Ishida Keiko | Japan | 83 |
| 254. | - |
Hisamatsu Shiho | Japan | 71 |
| 287. | - |
Hotta Tomoe | Japan | 56 |
| 294. | - |
Mochizuki Hiroko | Japan | 53 |
| 323. | - |
Takemura Ryoko | Japan | 45 |
| 325. | - |
Kawamata Riei | Japan | 45 |
| 338. | - |
Obata Saori | Japan | 40 |
| 376. | - |
Fujiwara Rika | Japan | 30 |
| 377. | - |
Tezuka Remi | Japan | 30 |
| 381. | - |
Taguchi Keiko | Japan | 29 |
| 382. | - |
Urabe Nami | Japan | 29 |
| 388. | - |
Kinjo Satomi | Japan | 28 |
| 407. | - |
Takase Ayami | Japan | 26 |
| 409. | - |
Okamoto Seiko | Japan | 26 |
| 440. | - |
Sasano Yoshiko | Japan | 22 |
| 462. | - |
Gunji Akiko | Japan | 20 |
| 465. | - |
Iijima Kumiko | Japan | 20 |
| 469. | - |
Fujii Yuki | Japan | 19 |
| 476. | - |
Kitamura Yumiko | Japan | 18 |
| 476. | - |
Umehara Sachie | Japan | 18 |
| 503. | - |
Arai Maki | Japan | 16 |
| 525. | - |
Yamanaka Mao | Japan | 14 |
| 541. | - |
Kurioka Satoko | Japan | 13 |
| 558. | - |
Aoyama Kaori | Japan | 13 |
| 582. | - |
Tameishi Keiko | Japan | 11 |
| 584. | - |
Nagano Chie | Japan | 11 |
| 622. | - |
Kuki Madoka | Japan | 10 |
| 687. | - |
Katsumi Shizu | Japan | 7 |
|1-50|
- Betting ranking
| Branstine Carson | +1222 |
| Bouzas Maneiro Jessica | +899 |
| Bagnis Facundo | +890 |
| Trungelliti Marco | +882 |
| Mensik Jakub | +867 |
| Krutykh Oleksii | -1062 |
| Bonzi Benjamin | -913 |
| Kolodynska Jana | -822 |
| Guillen Meza Alvaro | -819 |
| Added Dan | -817 |
This week's tournaments
| Main tournaments | ||||
| Madrid | 4 | |||
| Madrid WTA | 3 | |||
| Lower level tournaments | ||||
| Aix en Provence challenger | 12 | |||
| Cagliari challenger | 9 | |||
| Guangzhou challenger | 6 | |||
| Porto Alegre challenger | 10 | |||
| UTR Pro Tennis Series 3 | 8 | |||
| UTR Pro Tennis Series 5 | 2 | |||
| Bonita Springs ITF | 9 | |||
| Gifu ITF | 8 | |||
| Lleida | 4 | |||
| Saint-Malo WTA | 5 | |||
| Wiesbaden ITF | 6 | |||
| Lopota 2 ITF | 2 | |||
| Anapoima ITF | 11 | |||
| Boca Raton 3 ITF | 12 | |||
| Hammamet 7 ITF | 6 | |||
| Nottingham 7 ITF | 7 | |||
| Santa Margherita Di Pula 6 ITF | 10 | |||
| UTR Pro Tennis Series 5 | 4 | |||
| Yecla ITF | 8 | |||
| Antalya 17 ITF | 5 | |||
| Kursumlijska Banja 3 ITF | 7 | |||
| Monastir 34 ITF | 8 | |||
| Osijek ITF | 5 | |||
| Varberg ITF | 6 | |||
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