Originally Posted by spot
EVERY SINGLE TIME that I have seen someone calling footfaults in a match its because they were losing and were trying to jack with the opponents. I do not want to be in that group and I wouldn't have people on my team who wanted to win that way.
Every single time Federer has challenged using Hawk-Eye is when he would have lost the point.
It only matters if the FF happened. Other considerations are not relevant.