If the US Open tournament had 2r in 2012, what was it in 2010?
CREATE TABLE table_name_84 (
    tournament VARCHAR
)
SELECT 2010 FROM table_name_84 WHERE 2012 = "2r" AND tournament = "us open"
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: If the US Open tournament had 2r in 2012, what was it in 2010? ### Input: CREATE TABLE table_name_84 (
    tournament VARCHAR
) ### Response: SELECT 2010 FROM table_name_84 WHERE 2012 = "2r" AND tournament = "us open"