Kate Middleton and Prince William go to Wimbledon (PHOTOS)

Tennis has always been a Middleton family affair. But now it is a royal family affair.

Catherine, Duchess of Cambridge, and her trend-setting sister, Pippa Middleton, have both been spotted at tennis tournaments lately.

Kate, a huge tennis fan, brought the royal court to the tennis court at day seven of Wimbledon, bringing along with her Prince William. She and Will had the best seats in the house, watching British tennis star Andy Murray play against the French pro, RIchard Gasquet, from the Center Court's Royal Box, according to The Mirror.

Kate enthusiastically gave Murray's win a standing ovation with the rest of the crowd, which means it is likely that this will be the couple's first of many appearances in the royal box at Wimbledon.

See what else Kate has been up to as the Duchess of Cambridge (PHOTOS).

Meanwhile, across the pond in France, Kate's sister Pippa took time from her triathlon training to attend the French Open in Paris with a group of friends, reports The Telegraph. She then traveled back to London to watch a match between Spain's Rafael Nadal and the Czech Republic's Radek Stepanek at the AEGON Championships.

Both Middletons cheered on the players in their chic, fashionista style. The sisters dressed for the tennis occasions in comfortable, yet elegant, attire.