The 2009 Estoril Open was a tennis tournament played on outdoor clay courts. It was the 20th edition of the Estoril Open for the men (the 13th for the women), and was part of the ATP World Tour 250 series of the 2009 ATP World Tour, and of the International-level tournaments of the 2009 WTA Tour. Both the men's and the women's events took place at the Estádio Nacional in Oeiras, Portugal, from 2 May through 10 May 2009. The men's draw was headlined by Gilles Simon, former 2002 and 2006 champion David Nalbandian and 2003 champion Nikolay Davydenko. Other players included David Ferrer, Mardy Fish and 2001 champion Juan Carlos Ferrero. The women's draw was headlined by 2004 and 2008 finalist Iveta Benešová and 2008 champion Maria Kirilenko. Other players included Shahar Pe'er and Anna-Lena Grönefeld.

ATP entrants

Seeds

Other entrants

The following players received wildcards into the main draw: The following players received entry from the qualifying draw:

WTA entrants

Seeds

Other entrants

The following players received wildcards into the main draw: The following players received entry from the qualifying draw:

Finals

Men's singles

🇪🇸 Albert Montañés defeated 🇺🇸 James Blake, 5–7, 7–6(8–6), 6–0

Women's singles

🇧🇪 Yanina Wickmayer defeated 🇷🇺 Ekaterina Makarova, 7–5, 6–2

Men's doubles

🇺🇸 Eric Butorac / 🇺🇸 Scott Lipsky defeated 🇨🇿 Martin Damm / 🇸🇪 Robert Lindstedt, 6–3, 6–2

Women's doubles

🇺🇸 Raquel Kops-Jones / 🇺🇸 Abigail Spears defeated 🇨🇦 Sharon Fichman / 🇭🇺 Katalin Marosi, 2–6, 6–3, [10–5]