2001 Gerry Weber Open
Date	11–17 June
Edition	9th
Category	International Series
Draw	32S / 16D
Prize money	$975,000
Surface	Grass / outdoor
Location	Halle, Germany
Venue	Gerry Weber Stadion
Champions
Singles
Thomas Johansson[1]
Doubles
Daniel Nestor / Sandon Stolle[2]
← 2000 · Gerry Weber Open · 2002 →

The 2001 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 and was part of the International Series of the 2001 ATP Tour. It was the ninth edition of the tournament and took place from 11 June through 17 June 2001. Seventh-seeded Thomas Johansson won the singles title.

Finals

Singles

Thomas Johansson defeated Fabrice Santoro 6–3, 6–7^(5–7), 6–2

• It was Johansson's 1st singles title of the year and the 5th of his career.

Doubles

Daniel Nestor / Sandon Stolle defeated Max Mirnyi / Patrick Rafter 6–4, 6–7^(5–7), 6–1

• It was Nestor's 3rd title of the year and the 19th of his career. It was Stolle's 3rd title of the year and the 19th of his career.