| Doubles | |
|---|---|
| 1998 Mercedes-Benz Cup | |
| Champions |  Patrick Rafter Sandon Stolle [1] |
| Runners-up |  Jeff Tarango  Daniel Vacek |
| Score | 6–4, 6–4 |
| Draw | 16 |
| Seeds | 4 |
The 1998 Mercedes-Benz Cup was a men's tennis tournament played on hardcourt in Los Angeles, United States that was part of the International Series of the 1998 ATP Tour. It was the seventy-first edition of the tournament and was held from July 27 through August 2, 1998.
Champion seeds are indicated in bold text while text in italics indicates the round in which those seeds were eliminated.
Wayne Black / 
Sébastien Lareau (first round) Patrick Rafter / Sandon Stolle (champions)
John-Laffnie de Jager / Robbie Koenig (semifinals)| First round | Quarterfinals | Semifinals | Final [1] | ||||||||||||||||||||||||
| 1 | W Black S Lareau | 7 | 4 | 4 | |||||||||||||||||||||||
| J Tarango D Vacek | 6 | 6 | 6 | J Tarango D Vacek | w/o | ||||||||||||||||||||||
 G Ivanišević P Kilderry | 7 | 6 | G Ivanišević P Kilderry | ||||||||||||||||||||||||
| D Flach M Tebbutt | 6 | 4 | J Tarango D Vacek | 7 | 6 | ||||||||||||||||||||||
| 4 | J-L de Jager R Koenig | 6 | 4 | 6 | 4 | J-L de Jager R Koenig | 6 | 3 | |||||||||||||||||||
| B Bryan M Bryan | 1 | 6 | 3 | 4 | J-L de Jager R Koenig | 5 | 6 | 6 | |||||||||||||||||||
| A Peterson E Taino | 4 | 6 | 6 | A Peterson E Taino | 7 | 4 | 3 | ||||||||||||||||||||
| L Jensen M Jensen | 6 | 3 | 2 | J Tarango D Vacek | 4 | 4 | |||||||||||||||||||||
| G Stafford K Ullyett | 6 | 6 | 3 | P Rafter S Stolle | 6 | 6 | |||||||||||||||||||||
| B Coupe K Kinnear | 3 | 3 | G Stafford K Ullyett | 5 | 3 | ||||||||||||||||||||||
| 3 | P Rafter S Stolle | 7 | 7 | 3 | P Rafter S Stolle | 7 | 6 | ||||||||||||||||||||
 T Ketola  D Roditi | 6 | 6 | 3 | P Rafter S Stolle | 7 | 6 | |||||||||||||||||||||
| W Ferreira M Ondruska | 7 | 6 | M Damm J Grabb | 6 | 4 | ||||||||||||||||||||||
| W Black P Galbraith | 6 | 3 | W Ferreira M Ondruska | 3 | 1 | ||||||||||||||||||||||
| M Damm J Grabb | 6 | 6 | M Damm J Grabb | 6 | 6 | ||||||||||||||||||||||
| J-M Gambill V Spadea | 4 | 2 | |||||||||||||||||||||||||
Chris Evert was the defending champion of the singles event at the Virginia Slims of Los Angeles tennis tournament but did not compete that year.
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