Tennis Hawkeye Challenge

Tennis – line call challenges – what is the rule?
Is it 3 incorrect challenges or 3 challenges, whether right or wrong, if the Video ref (Hawkeye)? My feeling is it should be 3 incorrect challenges and the same number of correct challenges as you like.
This year Wimbledon will change, so that each set of 3 challenges whether true or not.
Categories: Tennis Women's News challenge, hawk-eye, instant, replay, tennis, tennis hawkeye challenge
