Task: Text to Code
Input (English): SQL: SELECT T1.country_code , T1.first_name FROM players AS T1 JOIN matches AS T2 ON T1.player_id = T2.loser_id WHERE T2.loser_ioc = "WTA Championships" INTERSECT SELECT T1.country_code , T1.first_name FROM players AS T1 JOIN matches AS T2 ON T1.player_id = T2.loser_id WHERE T2.loser_ioc = "Australian Open"
Feedback: In step 2 and step 3 you need to have tourney name and make sure player id and winner id are equivalent.
Output (English): SELECT T1.country_code ,  T1.first_name FROM players AS T1 JOIN matches AS T2 ON T1.player_id  =  T2.winner_id WHERE T2.tourney_name  =  'WTA Championships' INTERSECT SELECT T1.country_code ,  T1.first_name FROM players AS T1 JOIN matches AS T2 ON T1.player_id  =  T2.winner_id WHERE T2.tourney_name  =  'Australian Open'