Who were the semifinalists in the tournament where Mats Wilander 7-6, 6-3 was declared the champion?
CREATE TABLE "table1_29295463_9" (
  "week_of" text,
  "tournament" text,
  "champion" text,
  "runner_up" text,
  "semifinalists" text,
  "quarterfinalists" text
);
SELECT "semifinalists" FROM "table1_29295463_9" WHERE "champion"='Mats Wilander 7-6, 6-3';