All I can find of that is that Madison shares a sponsor (Evian) with Sharapova (match made on Madison Avenue,) and that she has beaten Venus, not dissed her publicly. If Sloane Stephens has dissed Serena, well, I'm sure Serena is laughing all the way to the hall of fame, while Sloane is basically non-existent on the tour. They are competitors, so I don't think they have to pay deep homage, publicly. I'm not sure why you resent so much that they don't. I would still be surprised if they don't admire her. And Venus.