CREATE TABLE table_204_287 (id DECIMAL, "outcome" TEXT, "no." DECIMAL, "date" DECIMAL, "championship" TEXT, "surface" TEXT, "opponent in the final" TEXT, "score in the final" TEXT)

when did he win his first title ?
SELECT MIN("date") FROM table_204_287 WHERE "outcome" = 'winner'
SELECT MIN("date") FROM "table_204_287" WHERE "outcome" = 'winner'