I've just checked the court circular for the day of the last Cup Final to see if the others were doing anything official.
27 May 2017
Kensington Palace
The Duchess of Gloucester this afternoon attended the Thirty Fifth Anniversary of the HMS ARDENT Association at HMS DRAKE, Plymouth, and was received by Her Majesty's Lord-Lieutenant of Devon (Mr. David Fursdon).
27 May 2017
Kensington Palace
Prince Henry of Wales this morning received President Obama.
27 May 2017
Kensington Palace
The Duke of Cambridge, President, the Football Association, this afternoon attended the Cup Final between Chelsea and Arsenal at Wembley Stadium, Middlesex.
27 May 2017
Buckingham Palace
The Queen was represented by the Very Reverend Professor Iain Torrance (Dean of the Chapel Royal in Scotland) at the Funeral of the Very Reverend James Weatherhead (Extra Chaplain to Her Majesty in Scotland) which was held in St. Giles' Cathedral, Edinburgh, this afternoon.