What was the partner of the team that faced the guillermo garcía-lópez albert portas on clay?
CREATE TABLE "doubles_10_5_5" (
  "outcome" text,
  "date" text,
  "surface" text,
  "partner" text,
  "opponents" text,
  "score" text
);
SELECT "partner" FROM "doubles_10_5_5" WHERE "surface"='clay' AND "opponents"='guillermo garcía-lópez albert portas';