The 2001 UBS Open was a men's tennis tournament played on outdoor clay courts at the Roy Emerson Arena in Gstaad in Switzerland and was part of the International Series of the 2001 ATP Tour.

It was the 56th edition of the tournament and ran from 9 July until 15 July 2001.

Jiří Novák won the singles title.

Jiří Novák defeated Juan Carlos Ferrero 6–1, 6–7(5–7), 7–5 Roger Federer / Marat Safin defeated Michael Hill / Jeff Tarango 0–1 (Hill and Tarango retired)