Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_25 (winner VARCHAR, finalist VARCHAR, tournament VARCHAR)

### Question ###
Who was the winner of the Miami tournament where Elena Dementieva was a finalist?

### Accurate SQL ###

SELECT winner FROM table_name_25 WHERE finalist = "elena dementieva" AND tournament = "miami"