text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE table_name_93 (opponent VARCHAR, date VARCHAR, championship VARCHAR, surface VARCHAR, outcome VARCHAR)
  ### Question:
  who is the opponent when the surface is clay, the outcome is winner and the championship is estoril on 15 april 1996?
  ### Answer:
  SELECT opponent FROM table_name_93 WHERE surface = "clay" AND outcome = "winner" AND championship = "estoril" AND date = "15 april 1996"