CREATE TABLE table_50644 ("Tournament" TEXT, "2000" TEXT, "2001" TEXT, "2002" TEXT, "2003" TEXT, "2004" TEXT, "2005" TEXT, "Career SR" TEXT, "Career Win-Loss" TEXT)

What is Tournament, when 2001 is '1R'?
SELECT "Tournament" FROM table_50644 WHERE "2001" = '1r'
SELECT "Tournament" FROM "table_50644" WHERE "2001" = '1r'