I was watching their US Open match where Serena had a lot of bad calls going against her that were clearly in, and the Commentators even J Mac was upset at the bad call Serena was getting, do you think that match had anything to do with it. I don't know of any other match where so many bad line calls where clearly visible. To be honest I would rather they leave hawk eye out of tennis and rely on better chair umpires to decided for themselves, it’s like in basketball the referees do and excellent job at making sure they make the best decision. I wouldn’t have a problem with the chair umpire and the lines person getting together and making a decision after a bad call and reassuring both players they are doing the best job they can.