What was the surface when he played with John Alexander? 
CREATE TABLE table_26309085_1 (surface VARCHAR, partner VARCHAR)
SELECT surface FROM table_26309085_1 WHERE partner = "John Alexander"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_26309085_1 (surface VARCHAR, partner VARCHAR) Question: What was the surface when he played with John Alexander?  [/INST] SELECT surface FROM table_26309085_1 WHERE partner = "John Alexander" </s>