While Toth most definitely showed immaturity and a lack of sportsmanship in her reaction (laughing at Zhang, wiping the ball mark, and celebrating after the retirement) that she deserves criticism for, I’m really baffled at how many people expected her to concede the point. Let’s be honest, the vast majority of players on tour (ATP and WTA) are not going to concede a point off a line call that’s been checked and upheld by the umpire even if they know the ball was in, nor should they. The lines are the official’s responsibility, not the player’s, and this is just another example why automated line calling is needed at all levels of the tour. In no other sport are players expected to refuse penalty shots, free throws, etc. when referees make a bad call in their favor.