I don't know what this is worth but this is about the two great young tennis stars the two sisters Venus and Serena Williams. I think it was in 1999 before one of Venus tennis matches they showed some old video recordings of their father coaching the two girls when they were about 11 and 10 and the father told them to do something in practice or he was going to give them a tickle. That was as far as it went. That indicates that maybe they are ticklish even though it is not in detail. Of course we all would have prefered to see current information but that is the best we have right now.