The 2011 Brussels Open, also known as the Brussels Open by GDF Suez for sponsor reasons, was a women's tennis tournament played on outdoor clay courts. It was the first edition of the Brussels Open, and was part of the Premier-level tournaments of the 2011 WTA Tour. The event took place at the Royal Primerose Tennis Club in Brussels, Belgium, from 14 May until 21 May 2011. First-seeded Caroline Wozniacki won the singles title.