James and Pippa Middleton, on their annual Caribbean vacation, were spotted playing tennis in St. Barts. It's unclear if James, 28, was joined by his girlfriend, Donna Air, while on the vacation, but the brother and sister pair were having plenty of fun on their own.
Pippa donned a chic red top and white skirt, while James looked more casual in a white T-shirt and printed shorts.
Tennis is just one of the 32-year-old Pippa's physical routines: She spent the last quarter of 2015 training for a 47-mile "swim run" in the ice-cold waters of Sweden's coast, and she and Princess Beatrice are both devoted fans of the Chelsea, London branch of barrecore.
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Pippa split from her boyfriend of three years, Nico Jackson, in October.
Recently, Pippa has been spending a lot of time with ex-boyfriend James Matthews. Not only was he by her side on vacation (along with brother James, his girlfriend, and parents Carol and Michael) in St. Barts over the summer, they also competed in the grueling Otillo race in Sweden together (he was James' teammate but the group ran half the course as a foursome).