CREATE TABLE table_43261 ("Week of" TEXT, "Tier" TEXT, "Winner" TEXT, "Runner-up" TEXT, "Semi finalists" TEXT)

Who were the semi finalists when Alexia Dechaume-Balleret Sandrine testud was the runner-up?
SELECT "Semi finalists" FROM table_43261 WHERE "Runner-up" = 'alexia dechaume-balleret sandrine testud'
SELECT "Semi finalists" FROM "table_43261" WHERE "Runner-up" = 'alexia dechaume-balleret sandrine testud'