CREATE TABLE table_19027 ("Year" FLOAT, "Mens singles" TEXT, "Womens singles" TEXT, "Mens doubles" TEXT, "Womens doubles" TEXT, "Mixed doubles" TEXT)

how many mens singles with mens doubles being pontus jantti lasse lindel f
SELECT COUNT("Mens singles") FROM table_19027 WHERE "Mens doubles" = 'Pontus Jantti Lasse Lindelöf'
SELECT COUNT("Mens singles") FROM "table_19027" WHERE "Mens doubles" = 'Pontus Jantti Lasse Lindelöf'