Init of LeaderboardServer.tournament_dataframes

server.py

@@ -165,6 +165,7 @@ class LeaderboardServer:
         self.submission_id_to_data = {}  # Only data (results and metadata) using by leaderboard
         self.tournament_results = None
         self.leaderboard_dataframes = {}  # For each category
+        self.tournament_dataframes = {}  # For each submission_id and category
         
         self.results_dataset_local_snapshot_lock = ReadWriteLock()
         self.results_dataset_local_snapshot = None