2006 ABN AMRO World Tennis Tournament – Singles

Roger Federer was the defending champion, but chose not to participate that year.

Radek Štěpánek won in the final 6–0, 6–3, against Christophe Rochus.

Seeds

 * 1) 🇪🇸 Rafael Nadal (withdrew due to a leg injury)
 * 2) 🇷🇺 Nikolay Davydenko (semifinals)
 * 3) 🇪🇸 David Ferrer (second round)
 * 4) 🇸🇪 Thomas Johansson (first round)
 * 5)  Mario Ančić (first round)
 * 6) 🇨🇿 Radek Štěpánek (champion)
 * 7) 🇫🇷 Sébastien Grosjean (withdrew due to personal reasons)
 * 8) 🇨🇿 Tomáš Berdych (first round)
 * 9) 🇷🇺 Igor Andreev (first round)