Morgan Riddle is being watched. Outside the grandstand, while she idles beneath the summer sun, a passerby stops, turns and points a phone at her, then wordlessly walks away. Riddle just adjusts her black oval Carolyn Bessette-Kennedy-style sunglasses.

Once inside the tennis match, while she and more than 1000 other spectators find their seats, people are more direct. “Are you Morgan?” “I recognise you!” “Can we get a photo?” She says yes at least a dozen times that afternoon.