The potential for a phone vote here is huge. And advertising - "Wimbledon Lie Detector is sponsored by Volkwagen - for a cleaner engine". And maybe finish off by making the guilty party run the gauntlet of Henman Hill / Murray Mount to be pelted with strawberries and doused in Pimms?
I have solution. If the umpire suspects foul play he can call for the "Lie Detector" machine to be brought out on court where - in front of the assembled masses -the accused is hooked up and quizzed on their injury via a series of quick-fire questions from guest panel comprised of Claude...