The 2000 Estoril Open was a tennis tournament played on outdoor clay courts. This event was the 11th edition of the Estoril Open, included in the 2000 ATP Tour International Series and in the 2000 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 April 10 through April 17, 2000.