Who are the quarterfinalists for runner-up  jimmy connors?
CREATE TABLE "table1_21584646_10" (
  "week_of" text,
  "tournament" text,
  "champion" text,
  "runner_up" text,
  "semifinalists" text,
  "quarterfinalists" text
);
SELECT "quarterfinalists" FROM "table1_21584646_10" WHERE "runner_up"='Jimmy Connors';