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_63958 ( "Name" text, "Nationality" text, "Races won" real, "Races ridden" real, "Win average" real )

### Question ###
How many races did the German racer that won less than 10 races ride?

### Accurate SQL ###

SELECT COUNT("Races ridden") FROM table_63958 WHERE "Nationality" = 'german' AND "Races won" < '10'