By Jon Wertheim In our latest mailbag, we look at some of the lingering storylines from Paris and the ATP’s recent plan to strengthen it’s biggest events. This week’s column comes: While relieved that the U.S. Open will enforce no Russian ban.While I hope, for Novak Djokovic’s sake, that, the tournament drops its policy demand vaccination for entry.While smiling at the story of Tim Van Rijthoven.While convinced there will be no tennis in China in 2022.While wondering when the will Saudis fix their gaze on tennis.Onward… Mailbag__Do you think Wimbledon will adjust the seeding for Serena, as t…