A palace spokesperson has also revealed that Queen Elizabeth II has kept the weekend free of engagements following her recent trip to Scotland. However, Prince William has a prior commitment and will not be able to attend.
© Rex Features / Ray Tang/Rex Features
[Catherine, Duchess of Cambridge and Prince William pictured at Wimbledon earlier this week]
"The Duchess is planning on attending but the Duke cannot because of a prior, private commitment," a statement from St James's Palace confirmed.
Royal family spokesperson Zaki Cooper told The Mirror: "We've been waiting for the semi-final outcome and the Queen has a private weekend. We don't yet know if she will be going to Wimbledon on Sunday, but a decision will be announced when it is made.
© PA Images / Adam Davy / POOL Wire / PA Wire
"The Queen keeps up to date with the news and reads the newspapers, so she's seen [Andy] Murray's progress."
Murray earlier became the first British tennis player to reach a Wimbledon men's singles final since Bunny Austin in 1938, beating Jo-Wilfried Tsonga in four sets.
Federer, meanwhile, beat reigning champion Novak Djokovic in four sets to progress to the final for the 8th time. He has won the title on six previous occasions.
