2005 BMW Open – Singles

Nikolay Davydenko was the defending champion, but lost in the second round this year.

David Nalbandian won the title, defeating Andrei Pavel 6–4, 6–1 in the final.

Seeds

 * 1) 🇦🇷 David Nalbandian (champion)
 * 2) 🇷🇺 Nikolay Davydenko (second round)
 * 3)  Mario Ančić (second round)
 * 4) 🇩🇪 Tommy Haas (semifinals)
 * 5)  Andrei Pavel (final)
 * 6) 🇷🇺 Igor Andreev (second round)
 * 7) 🇹🇭 Paradorn Srichaphan (second round)
 * 8) 🇩🇪 Rainer Schüttler (first round)