Tournaments
| Year | Tour | Tournament | Surface | Level | Dates | Matches | Champion |
|---|---|---|---|---|---|---|---|
| 1998 | ATP | Moscow | Carpet | ATP International Series | 1998-11-09 | 31 | Yevgeny Kafelnikov |
| 1998 | WTA | Philadelphia | Carpet | WTA Tour | 1998-11-09 | 27 | Steffi Graf |
| 1998 | ATP | Santiago | Clay | ATP International Series | 1998-11-09 | 31 | Francisco Clavet |
| 1998 | ATP | Stockholm | Hard | ATP International Series | 1998-11-09 | 31 | Todd Martin |
| 1998 | ATP | Bogota | Clay | ATP International Series | 1998-11-02 | 31 | Mariano Zabaleta |
| 1998 | WTA | Leipzig | Carpet | WTA Tour | 1998-11-02 | 27 | Steffi Graf |
| 1998 | ATP | Paris Masters | Carpet | Masters 1000 | 1998-11-02 | 47 | Greg Rusedski |
| 1998 | WTA | Luxembourg | Carpet | WTA Tour | 1998-10-26 | 29 | Mary Pierce |
| 1998 | ATP | Mexico City | Clay | ATP International Series | 1998-10-26 | 31 | Jiri Novak |
| 1998 | WTA | Quebec City | Carpet | WTA Tour | 1998-10-26 | 29 | Tara Snyder |
| 1998 | ATP | Stuttgart Masters | Hard | Masters 1000 | 1998-10-26 | 47 | Richard Krajicek |
| 1998 | WTA | Kremlin Cup | Carpet | WTA Tour | 1998-10-20 | 27 | Mary Pierce |
| 1998 | ATP | Lyon | Carpet | ATP International Series | 1998-10-19 | 31 | Alex Corretja |
| 1998 | ATP | Ostrava | Carpet | ATP International Series | 1998-10-19 | 31 | Andre Agassi |
| 1998 | ATP | Singapore | Carpet | ATP International Series | 1998-10-12 | 31 | Marcelo Rios |
| 1998 | ATP | Vienna | Carpet | ATP International Series | 1998-10-12 | 31 | Pete Sampras |
| 1998 | WTA | Zurich | Hard | WTA Tour | 1998-10-12 | 27 | Lindsay Davenport |
| 1998 | ATP | Basel | Hard | ATP International Series | 1998-10-05 | 31 | Tim Henman |
| 1998 | WTA | Filderstadt | Hard | WTA Tour | 1998-10-05 | 27 | Sandrine Testud |
| 1998 | ATP | Palermo | Clay | ATP International Series | 1998-10-05 | 31 | Mariano Puerta |
| 1998 | ATP | Shanghai | Carpet | ATP International Series | 1998-10-05 | 31 | Michael Chang |
| 1998 | ATP | Grand Slam Cup | Hard | ATP International Series | 1998-09-28 | 11 | Marcelo Rios |
| 1998 | WTA | Grand Slam Cup | Hard | WTA Tour | 1998-09-28 | 7 | Venus Williams |
| 1998 | ATP | Mallorca | Clay | ATP International Series | 1998-09-28 | 31 | Gustavo Kuerten |
| 1998 | ATP | Toulouse | Hard | ATP International Series | 1998-09-28 | 31 | Jan Siemerink |
| 1998 | ATP | Davis Cup G1 PO: AUT vs DEN | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: CHN vs INA | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: COL vs MEX | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: NOR vs CRO | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G2 F: PAK vs THA | Grass | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G2 F: URU vs VEN | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: CIV vs BLR | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: POR vs HUN | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: ARG vs SVK | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: AUS vs UZB | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: BRA vs ROU | Clay | Davis Cup | 1998-09-25 | 2 | - |
| 1998 | ATP | Davis Cup WG PO: CZE vs RSA | Clay | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: GBR vs IND | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: ISR vs FRA | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG PO: JPN vs RUS | Hard | Davis Cup | 1998-09-25 | 3 | - |
| 1998 | ATP | Davis Cup WG PO: NED vs ECU | Carpet | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG SF: SWE vs ESP | Carpet | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | ATP | Davis Cup WG SF: USA vs ITA | Hard | Davis Cup | 1998-09-25 | 4 | - |
| 1998 | WTA | Tokyo | Hard | WTA Tour | 1998-09-21 | 27 | Monica Seles |
| 1998 | WTA | Fed Cup WG1 F: SUI vs ESP | Hard | BJK Cup | 1998-09-19 | 4 | - |
| 1998 | ATP | Bournemouth | Clay | ATP International Series | 1998-09-14 | 31 | Felix Mantilla |
| 1998 | ATP | Bucharest | Clay | ATP International Series | 1998-09-14 | 31 | Francisco Clavet |
| 1998 | ATP | Tashkent | Hard | ATP International Series | 1998-09-14 | 31 | Tim Henman |
| 1998 | WTA | Kugayama 1 10K | Hard | Davis Cup | 1998-09-07 | 31 | Alicia Molik |
| 1998 | WTA | Kugayama 2 10K | Hard | Davis Cup | 1998-09-07 | 15 | Alicia Molik |
| 1998 | WTA | Kugayama 3 10K | Hard | Davis Cup | 1998-09-07 | 31 | Alicia Molik |
| 1998 | WTA | Kugayama 4 10K | Hard | Davis Cup | 1998-09-07 | 31 | Alicia Molik |
| 1998 | ATP | US Open | Hard | Grand Slam | 1998-08-31 | 127 | Patrick Rafter |
| 1998 | WTA | US Open | Hard | Grand Slam | 1998-08-31 | 127 | Lindsay Davenport |
| 1998 | ATP | Boston | Hard | ATP International Series | 1998-08-24 | 31 | Michael Chang |
| 1998 | ATP | Long Island | Hard | ATP International Series | 1998-08-24 | 31 | Patrick Rafter |
| 1998 | WTA | New Haven | Hard | WTA Tour | 1998-08-24 | 27 | Steffi Graf |
| 1998 | WTA | Canadian Open | Hard | WTA Tour | 1998-08-17 | 55 | Monica Seles |
| 1998 | ATP | Indianapolis | Hard | ATP International Series | 1998-08-17 | 55 | Alex Corretja |
| 1998 | ATP | New Haven | Hard | ATP International Series | 1998-08-17 | 55 | Karol Kucera |