Which 2007 has a 2008 of 1r, and a Tournament of wimbledon?
CREATE TABLE "singles_performance_timeline" (
  "tournament" text,
  "2002" text,
  "2004" text,
  "2005" text,
  "2006" text,
  "2007" text,
  "2008" text,
  "2009" text,
  "2010" text,
  "2011" text,
  "2012" text,
  "2013" text
);
SELECT "2007" FROM "singles_performance_timeline" WHERE "2008"='1r' AND "tournament"='wimbledon';