Gastón Gaudio was the defending champion but lost in the quarterfinals to Richard Gasquet. Richard Gasquet won in the final 7–6(7–4), 6–7(3–7), 6–3, 6–3 against Feliciano López. Seeds A champion seed is indicated in bold while text in italics indicates the round in which that seed was eliminated. Draw NB: The Final was the best of 5 sets while all other rounds were the best of 3 sets. Finals Section 1 Section 2 References Draw Qualifying draw Swiss Open (tennis) 2006 ATP Tour 2006 Allianz Suisse Open Gstaad