Queen Camilla made a royal appearance at Wimbledon on Wednesday, and fans quickly noticed a royal protocol had been snubbed.

Camilla was joined by her sister, Annabel Elliot, and Prince Albert of Monaco in the Royal Box at the All England Lawn Tennis and Croquet Club in London after meeting the ball boys and girls at the oldest tennis tournament in the world.

But while the special visitors had the best seat in the house, competitors participating did not bow or curtsy in her direction when taking the court, as some may expect.

Back in the day, athletes competing on Centre Court would bow or curtsy after taking the grass court if members of the royal family were seated in the Royal Box.

But, in 2003, under the wishes of the Duke of Kent, the Club's then-President, it was agreed that the tradition of players bowing or curtsying to members of the royal family on entering or leaving the Centre Court would be discontinued.

Click 'read more' to find out how the rule was updated.