Another fan said: “The best thing to happen in the game. Best photo.”
“Kate is what the world needs, feel she keeps it as real as she can,” one wrote.
“How very lovely and precious,” another said.
It was an important event for the royals, who attended previous games in the tournament.
George wore a suit and tie to the match, as he had before, although some fans were not keen on the ensemble, suggesting a football shirt would have been more appropriate.
She underwent a transformation, changing between the finals of Wimbledon and Wembley, a busy day for the royal.
Kate wore a gorgeous pink dress for the finals of Wimbledon.
She wore a £695 pink midi dress from Beulah London.
Kate paired the look with a pair of nude heels – thought to be the Nicholes court shoes from Aldo.