2001 Generali Open – SinglesÀlex Corretja was the defending champion but lost in the second round to Stefan Koubek.Nicolás Lapentti won in the final 1–6, 6–4, 7–5, 7–5 against Albert Costa.SeedsA champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. All sixteen seeds received a bye to the second round. Juan Carlos Ferrero ' Yevgeny Kafelnikov ' Àlex Corretja ' Franco Squillari ' Guillermo Coria ' Nicolás Lapentti Guillermo Cañas ' Alberto Martín ' Gastón Gaudio ' Álex Calatrava ' Andrei Pavel ' Wayne Arthurs ' Rainer Schüttler ' Andrea Gaudenzi ' Fernando Vicente ' Francisco Clavet ''''