| Doubles | |
|---|---|
| 1998 Legg Mason Tennis Classic | |
| Champions |  Grant Stafford  Kevin Ullyett [1] |
| Runners-up | Wayne Ferreira  Patrick Galbraith |
| Final score | 6–2, 6–4 |
| Draw | 28 |
| Seeds | 8 |
| Doubles | |
|---|---|
| 1998 Legg Mason Tennis Classic | |
| Champions | Grant Stafford Kevin Ullyett [1] |
| Runners-up | Wayne Ferreira Patrick Galbraith |
| Final score | 6–2, 6–4 |
| Draw | 28 |
| Seeds | 8 |
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Wayne Ferreira / Patrick Galbraith (final)
Max Mirnyi / 
Daniel Vacek (second round)
David Macpherson / David Wheaton (quarterfinals) Grant Stafford / Kevin Ullyett (champions) Justin Gimelstob / Jeff Tarango (first round) Paul Kilderry / Kent Kinnear (second round)
David Roditi / 
Sargis Sargsian (first round)| Semifinals | Final [1] | ||||||||||||
| 1 | Wayne Ferreira Patrick Galbraith | 7 | 6 | ||||||||||
 Mark Merklein Vince Spadea | 5 | 1 | |||||||||||
| 1 | Wayne Ferreira Patrick Galbraith | 2 | 4 | ||||||||||
| 5 | Grant Stafford Kevin Ullyett | 6 | 6 | ||||||||||
| 5 | Grant Stafford Kevin Ullyett | 4 | 6 | 6 | |||||||||
| Mike Bryan Bob Bryan | 6 | 3 | 4 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | W Ferreira P Galbraith | 6 | 6 | ||||||||||||||||||||||||
 Ó Burrieza  M Takada | 6 | 7 | Ó Burrieza M Takada | 0 | 3 | ||||||||||||||||||||||
 M Ruah  A Sá | 2 | 6 | 1 | W Ferreira P Galbraith | 4 | 6 | 6 | ||||||||||||||||||||
| M Tebbutt P Tramacchi | 6 | 6 | D Flach G Van Emburgh | 6 | 3 | 4 | |||||||||||||||||||||
| Y Auzoux P Harsanyi | 2 | 3 | M Tebbutt P Tramacchi | 4 | 2 | ||||||||||||||||||||||
| D Flach G Van Emburgh | 6 | 6 | D Flach G Van Emburgh | 6 | 6 | ||||||||||||||||||||||
| 8 | D Roditi S Sargsian | 4 | 4 | 1 | W Ferreira P Galbraith | 7 | 6 | ||||||||||||||||||||
| M Merklein V Spadea | 5 | 1 | |||||||||||||||||||||||||
| 3 | M Mirnyi D Vacek | 6 | 3 | ||||||||||||||||||||||||
| M Merklein V Spadea | 6 | 6 | M Merklein V Spadea | 7 | 6 | ||||||||||||||||||||||
G Doyle  E Taino | 3 | 2 | M Merklein V Spadea | 6 | 6 | ||||||||||||||||||||||
 E Ran  F Veglio | 7 | 4 | 7 |  B Kokavec M Osorio | 3 | 4 | |||||||||||||||||||||
| S Draper L Hewitt | 6 | 6 | 5 | E Ran F Veglio | 6 | 1 | 6 | ||||||||||||||||||||
| B Kokavec M Osorio | 6 | 6 | B Kokavec M Osorio | 3 | 6 | 7 | |||||||||||||||||||||
| 6 | J Gimelstob J Tarango | 3 | 1 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 5 | G Stafford K Ullyett | 6 | 6 | ||||||||||||||||||||||||
| J-M Gambill T Gambill | 3 | 2 | 5 | G Stafford K Ullyett | 6 | 7 | |||||||||||||||||||||
| P Goldstein S Humphries | 6 | 6 | P Goldstein S Humphries | 3 | 6 | ||||||||||||||||||||||
| A Painter G Silcock | 4 | 2 | 5 | G Stafford K Ullyett | 6 | 7 | |||||||||||||||||||||
 T Ketola D Nainkin | 6 | 6 | 6 | 4 | D Macpherson D Wheaton | 3 | 5 | ||||||||||||||||||||
| M Ondruska B Talbot | 4 | 7 | 2 | T Ketola D Nainkin | 5 | 4 | |||||||||||||||||||||
| 4 | D Macpherson D Wheaton | 7 | 6 | ||||||||||||||||||||||||
| 5 | G Stafford K Ullyett | 4 | 6 | 6 | |||||||||||||||||||||||
| 7 | P Kilderry K Kinnear | 6 | 3 | 6 | B Bryan M Bryan | 6 | 3 | 4 | |||||||||||||||||||
| M Wakefield W Whitehouse | 2 | 6 | 4 | 7 | P Kilderry K Kinnear | 2 | 6 | ||||||||||||||||||||
| B Bryan M Bryan | 6 | 6 | B Bryan M Bryan | 6 | 7 | ||||||||||||||||||||||
| B Martínez Ó Ortiz | 3 | 2 | B Bryan M Bryan | 4 | 6 | 6 | |||||||||||||||||||||
| D DiLucia M Sell | 7 | 6 | D DiLucia M Sell | 6 | 3 | 2 | |||||||||||||||||||||
| G Motomura T Suzuki | 6 | 1 | D DiLucia M Sell | 5 | 6 | 6 | |||||||||||||||||||||
| M Damm S Stolle | 7 | 3 | 4 | ||||||||||||||||||||||||
Greg Rusedski was the defending champion of the singles event of the Heineken Open tennis tournament, held in Auckland, New Zealand, but did not compete that year.
Gastón Gaudio was the defending champion but lost in the quarterfinals to Flávio Saretta.
Roger Federer was the defending champion but lost in the third round to Mark Philippoussis.
Félix Mantilla was the defending champion but lost in the second round to Mariano Zabaleta.
Kelly Evernden and Todd Witsken were the defending champions but they competed with different partners that year, Evernden with Nicolás Pereira and Witsken with Jorge Lozano.
Todd Woodbridge and Mark Woodforde were the defending champions but only Woodbridge competed that year with Jonas Björkman.
David Prinosil was the defending champion but lost in the second round to Roger Federer.
Olivier Rochus was the defending champion but did not compete that year.
Carlos Moyá was the defending champion and won in the final 6–2, 6–3 against David Ferrer.
Younes El Aynaoui was the defending champion but did not compete that year.
Félix Mantilla was the defending champion but did not compete that year.
José Acasuso was the defending champion but did not compete that year.
David Ferrer was the defending champion but lost in the first round to Galo Blanco.
David Nalbandian was the defending champion but lost the final on a walkover against Guillermo Coria.
Roger Federer was the defending champion and won in the final 4–6, 6–1, 6–2 against Feliciano López.
Trevor Kronemann and David Macpherson were the defending champions but lost in the quarterfinals to Luis Lobo and Javier Sánchez.
Wayne Ferreira and Yevgeny Kafelnikov were the defending champions but lost in the first round to David Rikl and Daniel Vacek.
David Prinosil was the defending champion but did not compete that year.
Luis Lobo and Javier Sánchez were the defending champions, but lost in the second round to Tomás Carbonell and Francisco Roig.
Jacco Eltingh and Paul Haarhuis were the defending champions. Eltingh chose not to participate. Haarhuis teamed up with Jared Palmer, but they lost in the first round to Andrea Gaudenzi and Diego Nargiso.