The 2006 Estoril Open was a tennis tournament played on outdoor clay courts. This event was the 17th edition of the Estoril Open for the men (the 10th for the women), included in the 2006 ATP Tour International Series and in the 2006 WTA Tour Tier IV Series. Both the men's and the women's events took place at the Estoril Court Central, in Oeiras, Portugal, from 1 May through 7 May 2006.

Finals

Men's singles

🇦🇷 David Nalbandian defeated 🇷🇺 Nikolay Davydenko, 6–3, 6–4

Women's singles

Zheng Jie defeated Li Na, 6–7(5–7), 7–5, retired

Men's doubles

🇨🇿 Lukáš Dlouhý / 🇨🇿 Pavel Vízner defeated 🇦🇷 Lucas Arnold / 🇨🇿 Leoš Friedl, 6–3, 6–1

Women's doubles

Li Ting / Sun Tiantian defeated 🇦🇷 Gisela Dulko / 🇪🇸 María Sánchez Lorenzo, 6–2, 6–2