CREATE TABLE table_38114 ("Outcome" TEXT, "Date" TEXT, "Surface" TEXT, "Partner" TEXT, "Opponent in the Final" TEXT, "Score" TEXT)

On what Surface was the game with Partner David Martin played Scoring 4 6, 6 7 (4-7)?
SELECT "Surface" FROM table_38114 WHERE "Partner" = 'david martin' AND "Score" = '4–6, 6–7 (4-7)'
SELECT "Surface" FROM "table_38114" WHERE "Partner" = 'david martin' AND "Score" = '4–6, 6–7 (4-7)'