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
| 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 | 1 | |||
| Eastbourne | 18 | |||
| Mallorca | 15 | |||
| Bad Homburg WTA | 13 | |||
| Eastbourne | 19 | |||
| 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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