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_25802618_15 (stage INTEGER, winner VARCHAR)

### Question ###
What was the latest stage won by Mikhail Ignatiev? 

### Accurate SQL ###

SELECT MAX(stage) FROM table_25802618_15 WHERE winner = "Mikhail Ignatiev"