Name the surface for cara black rennae stubbs
CREATE TABLE table_23944006_4 (surface VARCHAR, opponents VARCHAR)
SELECT surface FROM table_23944006_4 WHERE opponents = "Cara Black Rennae Stubbs"
### Context: CREATE TABLE table_23944006_4 (surface VARCHAR, opponents VARCHAR) ### Question: Name the surface for cara black rennae stubbs ### Answer: SELECT surface FROM table_23944006_4 WHERE opponents = "Cara Black Rennae Stubbs"