Tournaments
| Year | Tour | Tournament | Surface | Level | Dates | Matches | Champion |
|---|---|---|---|---|---|---|---|
| 1998 | WTA | Boston | Hard | WTA Tour | 1998-08-10 | 29 | Mariaan De Swardt |
| 1998 | ATP | Cincinnati Masters | Hard | Masters 1000 | 1998-08-10 | 55 | Patrick Rafter |
| 1998 | WTA | Manhattan Beach | Hard | WTA Tour | 1998-08-10 | 27 | Lindsay Davenport |
| 1998 | ATP | San Marino | Clay | ATP International Series | 1998-08-10 | 31 | Dominik Hrbaty |
| 1998 | ATP | Amsterdam | Clay | ATP International Series | 1998-08-03 | 31 | Magnus Norman |
| 1998 | ATP | Canada Masters | Hard | Masters 1000 | 1998-08-03 | 55 | Patrick Rafter |
| 1998 | WTA | Istanbul | Hard | WTA Tour | 1998-08-03 | 31 | Henrieta Nagyova |
| 1998 | WTA | San Diego | Hard | WTA Tour | 1998-08-03 | 27 | Lindsay Davenport |
| 1998 | ATP | Kitzbuhel | Clay | ATP International Series | 1998-07-27 | 47 | Albert Costa |
| 1998 | ATP | Los Angeles | Hard | ATP International Series | 1998-07-27 | 31 | Andre Agassi |
| 1998 | WTA | Sopot | Clay | WTA Tour | 1998-07-27 | 31 | Henrieta Nagyova |
| 1998 | WTA | Stanford | Hard | WTA Tour | 1998-07-27 | 27 | Lindsay Davenport |
| 1998 | ATP | Umag | Clay | ATP International Series | 1998-07-27 | 31 | Bohdan Ulihrach |
| 1998 | WTA | Fed Cup WG1 PO: CRO vs NED | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG1 PO: CZE vs ITA | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG1 PO: RUS vs GER | Hard | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG1 PO: SVK vs BEL | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG1 SF: ESP vs USA | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG1 SF: SUI vs FRA | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG2 PO: AUS vs ARG | Carpet | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG2 PO: AUT vs POL | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG2 PO: BLR vs VEN | Hard | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | WTA | Fed Cup WG2 PO: KOR vs JPN | Clay | BJK Cup | 1998-07-25 | 4 | - |
| 1998 | ATP | Stuttgart Outdoor | Clay | ATP International Series | 1998-07-20 | 47 | Gustavo Kuerten |
| 1998 | ATP | Washington | Hard | ATP International Series | 1998-07-20 | 55 | Andre Agassi |
| 1998 | ATP | Davis Cup G1 PO: CHI vs COL | Carpet | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: KOR vs CHN | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: LIB vs INA | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G1 PO: MEX vs BAH | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: BUL vs LUX | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: CUB vs GUA | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: HKG vs PHI | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: IRL vs MON | Carpet | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: LAT vs GEO | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: PAR vs JAM | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: POL vs EGY | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 PO: QAT vs POC | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 QF: HUN vs SLO | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 QF: MAR vs BLR | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 QF: SEN vs CIV | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 QF: YUG vs POR | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: HAI vs VEN | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: IRI vs PAK | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: THA vs TPE | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup G2 SF: URU vs PER | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup WG QF: ESP vs SUI | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup WG QF: GER vs SWE | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup WG QF: ITA vs ZIM | Clay | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | ATP | Davis Cup WG QF: USA vs BEL | Hard | Davis Cup | 1998-07-17 | 4 | - |
| 1998 | WTA | Palermo | Clay | WTA Tour | 1998-07-13 | 31 | Patty Schnyder |
| 1998 | WTA | Warsaw | Clay | WTA Tour | 1998-07-13 | 29 | Conchita Martinez |
| 1998 | ATP | Bastad | Clay | ATP International Series | 1998-07-06 | 31 | Magnus Gustafsson |
| 1998 | ATP | Gstaad | Clay | ATP International Series | 1998-07-06 | 31 | Alex Corretja |
| 1998 | WTA | Maria Lankowitz | Clay | WTA Tour | 1998-07-06 | 31 | Patty Schnyder |
| 1998 | ATP | Newport | Grass | ATP International Series | 1998-07-06 | 31 | Leander Paes |
| 1998 | WTA | Prague | Clay | WTA Tour | 1998-07-06 | 31 | Jana Novotna |
| 1998 | ATP | Wimbledon | Grass | Grand Slam | 1998-06-22 | 127 | Pete Sampras |
| 1998 | WTA | Wimbledon | Grass | Grand Slam | 1998-06-22 | 127 | Jana Novotna |
| 1998 | WTA | Eastbourne | Grass | WTA Tour | 1998-06-15 | 27 | Jana Novotna |
| 1998 | ATP | Nottingham | Grass | ATP International Series | 1998-06-15 | 31 | Jonas Bjorkman |