2003 Gerry Weber Open
Date	9–15 June
Edition	11th
Category	International Series
Draw	32S / 16D
Prize money	$775,000
Surface	Grass / outdoor
Location	Halle, Germany
Venue	Gerry Weber Stadion
Champions
Singles
Roger Federer[1]
Doubles
Jonas Björkman / Todd Woodbridge[2]
← 2002 · Gerry Weber Open · 2004 →

The 2003 Gerry Weber Open was a men's tennis tournament played on grass courts at the Gerry Weber Stadion in Halle, North Rhine-Westphalia in Germany that was part of the International Series of the 2003 ATP Tour. It was the 11th edition of the tournament and was held from 9 June until 15 June 2003. First-seeded Roger Federer won the singles title.

Finals

Singles

Roger Federer defeated Nicolas Kiefer 6–1, 6–3

• It was Federer's 4th singles title of the year and the 8th of his career.

Doubles

Jonas Björkman / Todd Woodbridge defeated Martin Damm / Cyril Suk 6–3, 6–4

• It was Björkman's 1st title of the year and the 35th of his career. It was Woodbridge's 1st title of the year and the 77th of his career.