If the game is incomplete at the end of the additional turns, a player is declared the winner of the game if they have a point lead of two or more. If no player has a point lead of two or more, the game is a draw.
§ 408.2.b Tournament Rules PDF (officieel)
§ 408 End of Match Procedure
§ 408.2 If the time limit for a competition round is reached before a winner is determined, the player whose turn it is finishes their turn.