CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);

Question: What was the 2013 finish for the tournament that had a 2007 finish of A?
SQL: SELECT "2013" FROM "singles_performance_timeline" WHERE "2007"='a';

Question: What was the 2012 finish in the US Open?
SQL: SELECT "2012" FROM "singles_performance_timeline" WHERE "tournament"='us open';

Question: Which tournament had a 2010 finish of 4R?
SQL: SELECT "tournament" FROM "singles_performance_timeline" WHERE "2010"='4r';