CREATE TABLE table_4724 ("Rank" FLOAT, "Player" TEXT, "County" TEXT, "Tally" TEXT, "Total" FLOAT, "Opposition" TEXT)

What is the highest ranked player who opposed Westmeath?
SELECT MAX("Rank") FROM table_4724 WHERE "Opposition" = 'westmeath'
SELECT MAX("Rank") FROM "table_4724" WHERE "Opposition" = 'westmeath'