Originally Posted by dlam
Yes so the returner can hit winners all day and call my "outs" in and when he misses, hits wide, or hits the net he calls the one that was in "out"
Makes sense to me
Your opponent can do this on any borderline shot, not just service returns. There's no rule that can prevent your opponent from cheating.
The principle at work here is that can you only overrule your opponent's call when that overrule will benefit your opponent. I think that principle makes sense.