2003 MercedesCup
Date	14–20 July
Edition	55th
Category	International Series Gold
Draw	48S / 16D
Prize money	$665,000
Surface	Clay / outdoor
Location	Stuttgart, Germany
Venue	Tennis Club Weissenhof
Champions
Singles
Guillermo Coria[1]
Doubles
Tomáš Cibulec / Pavel Vízner[2]
← 2002 · Stuttgart Open · 2004 →

The 2003 MercedesCup was a men's tennis tournament played on outdoor clay courts at the Tennis Club Weissenhof in Stuttgart, Germany and was part of the International Series Gold of the 2003 ATP Tour. The tournament was held from 14 July until 20 July 2003. Second-seeded Guillermo Coria won the singles.

Guillermo Coria defeated Tommy Robredo 6–2, 6–2, 6–1

• It was Coria's 2nd title of the year and the 3rd of his career.

Tomáš Cibulec / Pavel Vízner defeated Yevgeny Kafelnikov / Kevin Ullyett 3–6, 6–3, 6–4

• It was Cibulec's 2nd title of the year and the 3rd of his career. It was Vízner's 2nd title of the year and the 5th of his career.

• Official website
• ITF tournament edition details
• ATP tournament profile