| Singles | |
|---|---|
| 1998 Mercedes-Benz Cup | |
| Champion |  Andre Agassi [1] |
| Runner-up |  Tim Henman |
| Score | 6–4, 6–4 |
| Draw | 32 (4 Q / 2 WC ) |
| Seeds | 8 |
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.
Patrick Rafter (quarterfinals) Tim Henman (final)
Goran Ivanišević (first round) Andre Agassi (champion)
Wayne Ferreira (first round)
Byron Black (quarterfinals) Vince Spadea (second round)| Semifinals | Final [1] | ||||||||||||
| WC | Justin Gimelstob | 0 | 62 | ||||||||||
| 5 | Andre Agassi | 6 | 7 | ||||||||||
| 5 | Andre Agassi | 6 | 6 | ||||||||||
| 2 | Tim Henman | 4 | 4 | ||||||||||
 Guillaume Raoux | 5 | 3 | |||||||||||
| 2 | Tim Henman | 7 | 6 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | P Rafter | 6 | 6 | ||||||||||||||||||||||||
 R Delgado | 3 | 2 | 1 | P Rafter | 6 | 5 | 6 | ||||||||||||||||||||
 M Damm | 2 | 7 | 6 | M Damm | 3 | 7 | 1 | ||||||||||||||||||||
| W Black | 6 | 5 | 0 | 1 | P Rafter | 4 | 3 | ||||||||||||||||||||
| WC | J Gimelstob | 6 | 6 | WC | J Gimelstob | 6 | 6 | ||||||||||||||||||||
| D Vacek | 4 | 0 | WC | J Gimelstob | 6 | 3 | |||||||||||||||||||||
| 8 | V Spadea | 2 | 6 | 6 | 8 | V Spadea | 3 | 0 | R | ||||||||||||||||||
| Q | M Ondruska | 6 | 3 | 3 | WC | J Gimelstob | 0 | 62 | |||||||||||||||||||
| LL | S Stolle | 6 | 6 | 5 | A Agassi | 6 | 7 | ||||||||||||||||||||
| Q | T Dent | 3 | 2 | LL | S Stolle | 6 | 7 | ||||||||||||||||||||
| A Ilie | 6 | 6 | A Ilie | 3 | 66 | ||||||||||||||||||||||
| PR | MV Washington | 4 | 1 | LL | S Stolle | 62 | 2 | ||||||||||||||||||||
| J-M Gambill | 6 | 6 | 5 | A Agassi | 7 | 6 | |||||||||||||||||||||
| S Campbell | 4 | 4 | J-M Gambill | 4 | 4 | ||||||||||||||||||||||
| 5 | A Agassi | 6 | 6 | 5 | A Agassi | 6 | 6 | ||||||||||||||||||||
| WC | B Bryan | 4 | 3 | ||||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
 S Sargsian | 6 | 6 | |||||||||||||||||||||||||
| 6 | W Ferreira | 1 | 2 | S Sargsian | 3 | 6 | 2 | ||||||||||||||||||||
| Q | M Joyce | 7 | 2 | 7 | M Joyce | 6 | 4 | 6 | |||||||||||||||||||
| M Tebbutt | 5 | 6 | 5 | M Joyce | 7 | 4 | 5 | ||||||||||||||||||||
 K Carlsen | 7 | 6 | G Raoux | 67 | 6 | 7 | |||||||||||||||||||||
| LL |  Ó Burrieza | 5 | 4 | K Carlsen | 67 | 7 | 63 | ||||||||||||||||||||
| G Raoux | 6 | 6 | G Raoux | 7 | 61 | 7 | |||||||||||||||||||||
| 3 | G Ivanišević | 4 | 4 | G Raoux | 5 | 3 | |||||||||||||||||||||
| 7 | B Black | 6 | 7 | 2 | T Henman | 7 | 6 | ||||||||||||||||||||
 S Schalken | 4 | 68 | 7 | B Black | 6 | 6 | |||||||||||||||||||||
 G Pozzi | 6 | 6 | G Pozzi | 3 | 2 | ||||||||||||||||||||||
 G Cañas | 2 | 4 | 7 | B Black | 7 | 1 | 4 | ||||||||||||||||||||
| J Tarango | 6 | 6 | 2 | T Henman | 5 | 6 | 6 | ||||||||||||||||||||
| Q |  A Hernández | 2 | 2 | J Tarango | 66 | 5 | |||||||||||||||||||||
| 2 | T Henman | 6 | 6 | 2 | T Henman | 7 | 7 | ||||||||||||||||||||
| G Stafford | 3 | 0 | |||||||||||||||||||||||||
Steffi Graf was the defending champion but did not compete that year.
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.
Patty Fendick and Jill Hetherington were the defending champions of the doubles event at the 1989 Virginia Slims of Los Angeles tennis tournament but lost in the quarterfinals to Elizabeth Smylie and Janine Tremelling.
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