Kate and Mirka both looked on and applauded as the eight-time Wimbledon champion was honoured on Centre Court for his incredible sporting achievements, having retired from playing tennis last year.
But some noticed his wife looked “glum” and like she was having a “sulk” as Kate and Federer eagerly chatted and laughed together.
Body language expert Judi James commented on the images, and told Express.co.uk: “Alongside these signals of respect and friendship Roger’s wife Mirka looks almost comical.
“Staring straight ahead with a glum facial expression, apparently blanking her husband as he turns to grin and chat, Mirka looks like a woman in the throes of a sulk, and that fist balled under her chin adds to that suggestion she might just have been feeling neglected.
“It is a moment captured though and might possibly be misleading! She did attempt a closed lip smile as Kate walked past her.”
It was a joyous occasion for Kate and Federer as both seemed to be equally admiring of each other, with the Princess being in “awe” of the sports star.
Ms James explained: “There’s clearly a strong level of fan-ship between Kate and Roger Federer as well as friendship. Kate’s hand clasp with fingers in the pray position suggests she’s overcome with awed delight to be sitting with him and her increase of touch rituals, like this hand on the arm, as well as the way the pair lean together, suggests the pleasure is mutual.
“They look charming and polite together and their trait of mirrored poses let us know that the blend of sporting hero and royal icon is a powerful one.”
In other moments Mirka was seen engaging with Kate as her husband sat between the two women, with all three standing to applaud during the game.
If she was feeling a bit left out however there is one other senior royal who may understand how she feels.
Ms James continued: “In terms of standing aside glum faced while some sparkling, fun body language goes on beside you, Mirka might find unlikely empathy from Prince William, who was often photographed looking glum beside brother Harry and wife Kate as they shared jokes and mirrored body language back in the day.”
It is expected that Kate will attend the tournament again another day as she is a huge fan and advocate of playing sport.
