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)

where did he win his last championship ?
SELECT "championship" FROM table_204_287 WHERE "outcome" = 'winner' ORDER BY id DESC LIMIT 1
SELECT "championship" FROM "table_204_287" WHERE "outcome" = 'winner' ORDER BY "id" DESC NULLS LAST LIMIT 1