Re: Hawk-Eye doubts emerge.
One argument you can make is that no publicly validated study has been done on the accuracy of Hawkeye with the use of TV cameras/close-ups to see how accurate Hawkeye is. In fact TV camera close-ups of balls near the lines have been aggressively prohibited in guidelines the TV directors since the introduction of Hawkeye. Instead the internal studies of the Hawkeye company have been taken as conclusive evidence on the accuracy and error margins.
I am not saying it isn't accurate or useful, just that there has been a push and strategy to avoid criticism or make it difficult to verify the accuracy for anyone on the outside.
TT Singles 2012: W: Winston-Salem SF: Honolulu CH, Rotterdam, Memphis, 's-Hertogenbosch, Wimbledon, Beijing, Vienna QF: Barcelona, Nice, Bastad, Petange CH, Bangkok R16: Monte Carlo, Madrid
TT Doubles 2012: W: Caloundra CH (with kingroger), Acapulco (with keqtqiadv) F: Beijing (with KittyTennis) SF: Sydney (with Belludal), Memphis (with Belludal), Guadalajara CH (with kingroger), Wimbledon (with RHB1993) QF: Barcelona (with extremaduratenis), Cincinnati (with stbanchile)