CREATE TABLE table_48516 ("Res." TEXT, "Record" TEXT, "Opponent" TEXT, "Method" TEXT, "Event" TEXT, "Round" FLOAT, "Time" TEXT, "Location" TEXT)

What is the average round of the match with kevin manderson as the opponent?
SELECT AVG("Round") FROM table_48516 WHERE "Opponent" = 'kevin manderson'
SELECT AVG("Round") FROM "table_48516" WHERE "Opponent" = 'kevin manderson'