Why does Anna Wintour look so mad? She’s at the U.S. Open; she should be having fun! Is it because she’s been exposed to sunlight? Nope. It’s because one of her dreadful aides has failed her once again. A Daily Intel spy spotted Miss Anna reaming out the hapless helper outside of Court 13 on day one of the Open yesterday because she was briefly denied access to the stands. Seems officials wouldn’t let her — or anyone else, not that that matters — in until a changeover. Bad assistant! Very bad!