CREATE TABLE table_68800 ("Year" FLOAT, "Men's singles" TEXT, "Women's singles" TEXT, "Men's doubles" TEXT, "Women's doubles" TEXT, "Mixed doubles" TEXT)

After 1999, who played Men's Doubles when Kasper Ipsen played Men's Singles?
SELECT "Men's doubles" FROM table_68800 WHERE "Year" > '1999' AND "Men's singles" = 'kasper ipsen'
SELECT "Men's doubles" FROM "table_68800" WHERE "Men's singles" = 'kasper ipsen' AND "Year" > '1999'