Prince William and Kate Middleton's three children were treated to a special gift from Wimbledon champion Jannik Sinner over the weekend. On Sunday, the future king and queen of England made a surprise appearance at the iconic tennis match, alongside two of their children, Prince George, 11, and Princess Charlotte, 10.

Kate Middleton had a second outing of the weekend at Wimbledon to see the men compete in the singles final, and she brought Prince William, Prince George and Princess Charlotte along.

As Wimbledon men's champion Jannik Sinner signed tennis balls for Prince George and Princess Charlotte, the Princess of Wales shared that they'd brought along a third ball for Prince Louis