who won both the st.petersburg open and the atp world tour finals ?
CREATE TABLE table_204_724 (
    id number,
    "outcome" text,
    "no." number,
    "date" text,
    "tournament" text,
    "surface" text,
    "partner" text,
    "opponents in the final" text,
    "score in the final" text
)
SELECT "partner" FROM table_204_724 WHERE "tournament" = 'atp world tour finals'
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: who won both the st.petersburg open and the atp world tour finals ? ### Input: CREATE TABLE table_204_724 (
    id number,
    "outcome" text,
    "no." number,
    "date" text,
    "tournament" text,
    "surface" text,
    "partner" text,
    "opponents in the final" text,
    "score in the final" text
) ### Response: SELECT "partner" FROM table_204_724 WHERE "tournament" = 'atp world tour finals'