WTA and ATP rankings on - 28.12.1998
- Searching
- Ranking - singles
- Ranking - doubles
- Race - singles
| Rank | Move | Player name | Country | Points |
| 558. | - |
Aoyama Kaori | Japan | 13 |
| 503. | - |
Arai Maki | Japan | 16 |
| 208. | - |
Asagoe Shinobu | Japan | 99 |
| 469. | - |
Fujii Yuki | Japan | 19 |
| 376. | - |
Fujiwara Rika | Japan | 30 |
| 462. | - |
Gunji Akiko | Japan | 20 |
| 61. | - |
Hiraki Rika | Japan | 592 |
| 254. | - |
Hisamatsu Shiho | Japan | 71 |
| 287. | - |
Hotta Tomoe | Japan | 56 |
| 465. | - |
Iijima Kumiko | Japan | 20 |
| 199. | - |
Inoue Haruka | Japan | 110 |
| 187. | - |
Inoue Maiko | Japan | 122 |
| 234. | - |
Ishida Keiko | Japan | 83 |
| 687. | - |
Katsumi Shizu | Japan | 7 |
| 325. | - |
Kawamata Riei | Japan | 45 |
| 388. | - |
Kinjo Satomi | Japan | 28 |
| 476. | - |
Kitamura Yumiko | Japan | 18 |
| 622. | - |
Kuki Madoka | Japan | 10 |
| 541. | - |
Kurioka Satoko | Japan | 13 |
| 294. | - |
Mochizuki Hiroko | Japan | 53 |
| 584. | - |
Nagano Chie | Japan | 11 |
| 230. | - |
Nagatomi Keiko | Japan | 85 |
| 338. | - |
Obata Saori | Japan | 40 |
| 409. | - |
Okamoto Seiko | Japan | 26 |
| 115. | - |
Saeki Miho | Japan | 239 |
| 440. | - |
Sasano Yoshiko | Japan | 22 |
| 49. | - |
Smith Nana | Japan | 704 |
| 12. | - |
Sugiyama Ai | Japan | 1864 |
| 381. | - |
Taguchi Keiko | Japan | 29 |
| 407. | - |
Takase Ayami | Japan | 26 |
| 323. | - |
Takemura Ryoko | Japan | 45 |
| 582. | - |
Tameishi Keiko | Japan | 11 |
| 377. | - |
Tezuka Remi | Japan | 30 |
| 476. | - |
Umehara Sachie | Japan | 18 |
| 382. | - |
Urabe Nami | Japan | 29 |
| 525. | - |
Yamanaka Mao | Japan | 14 |
| 65. | - |
Yoshida Yuka | Japan | 537 |
|1-50|
- Betting ranking
| Branstine Carson | +1222 |
| Turker Mert Naci | +1127 |
| Bagnis Facundo | +1005 |
| Wang Meiling | +979 |
| Trungelliti Marco | +968 |
| Krutykh Oleksii | -1078 |
| Bonzi Benjamin | -952 |
| Kolodynska Jana | -872 |
| Lobanov Aleksandr | -822 |
| Marcinkevica Diana | -810 |
This week's tournaments
| Main tournaments | ||||
| Rome | 12 | |||
| Rome WTA | 8 | |||
| Lower level tournaments | ||||
| Bordeaux challenger | 20 | |||
| Turin challenger | 20 | |||
| Taipei challenger | 20 | |||
| Tunis challenger | 19 | |||
| Oeiras 2 challenger | 18 | |||
| UTR Pro Tennis Series 5 | 2 | |||
| UTR Pro Tennis Series 8 | 1 | |||
| Paris WTA | 12 | |||
| Parma | 15 | |||
| Madrid 19 ITF | 28 | |||
| Kurume ITF | 14 | |||
| Zagreb ITF | 20 | |||
| Anning ITF | 18 | |||
| Bethany Beach ITF | 22 | |||
| Monzon ITF | 20 | |||
| Warmbad-Villach ITF | 20 | |||
| Antalya 19 ITF | 24 | |||
| Kranjska Gora ITF | 27 | |||
| Kursumlijska Banja 5 ITF | 23 | |||
| Monastir 36 ITF | 25 | |||
| Toyama ITF | 25 | |||
| UTR Pro Match Series | 6 | |||
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