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 matches (winner_name VARCHAR, tourney_name VARCHAR, winner_rank_points VARCHAR)

### Question ###
Find the name of the winner who has the highest rank points and participated in the Australian Open tourney.

### Accurate SQL ###

SELECT winner_name FROM matches WHERE tourney_name = 'Australian Open' ORDER BY winner_rank_points DESC LIMIT 1