Prince William and Kate's amusing moment comes as the Duchess officially returned to her royal duties one day after Prince Louis' christening, alongside sister-in-law Meghan Markle, who is now the Duchess of Sussex.
But while Harry is less confident about England's chances, his brother Prince William appears to be more optimistic.
Wickstead addressed the commentary in an Instagram post: "Her Royal Highness, the Duchess of Sussex looked absolutely attractive on her wedding day and I have the utmost admiration and respect for her".
Meghan Markle can be seen in the video above crossing her legs. She wore her hair back in a loose bun, and paired the look with a large black handbag.
The Duke and Duchess of Sussex began their first official global visit together when they arrived in Ireland on Tuesday.
The Duchess of Sussex touched down in Ireland on Tuesday afternoon and looked typically stunning in her travelling outfit, which consisted of an emerald green top and skirt by one of her favourite designers Givenchy. They will also visit the historic Book of Kells in the Old Library at Trinity College, followed by a walk around the college itself.
Kevin Doyle, political editor at the Irish Independent, tweeted that he hadn't been able to confirm whether Harry and Meghan drank "any of the 14 bottles of water".
Meghan Markle and Prince Harry attend a reception at Glencairn, the residence of Robin Barnett, the British ambassador to Ireland.
Other visits include DogPatch Labs to meet youth learning coding through free workshops.
They kicked off the second day with a meeting with Irish President Michael Higgins, during which Harry announced "it's coming home".