Table: tennis_grand_slam
Columns: year
grand_slam
round
winner
loser

Question: In which round was Barbara Hawcroft the loser?
SQL: SELECT "round" FROM tennis_grand_slam WHERE "loser" = 'barbara hawcroft'

Question: In which year is Nerida Gregory listed as the loser?
SQL: SELECT AVG("year") FROM tennis_grand_slam WHERE "loser" = 'nerida gregory'

Question: In which year did Misaki Doi lose the Australian Open Grand Slam?
SQL: SELECT SUM("year") FROM tennis_grand_slam WHERE "grand_slam" = 'australian open' AND "loser" = 'misaki doi'