CREATE TABLE table_204_651 (id DECIMAL, "date" TEXT, "championship" TEXT, "location" TEXT, "category" TEXT, "surface" TEXT, "prev. result" TEXT, "prev. points" DECIMAL, "new points" DECIMAL, "outcome" TEXT)

what is the number of games played on hard surfaces this season ?
SELECT COUNT(*) FROM table_204_651 WHERE "surface" = 'hard'
SELECT COUNT(*) FROM "table_204_651" WHERE "surface" = 'hard'