What 1993 has 2r as a 1994, and 1r as a 1995?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "1990" text,
  "1991" text,
  "1992" text,
  "1993" text,
  "1994" text,
  "1995" text,
  "1996" text,
  "1997" text,
  "1998" text,
  "1999" text,
  "2000" text
);
SELECT "1993" FROM "singles_performance_timeline" WHERE "1994"='2r' AND "1995"='1r';