Game, set and match to the Middletons

Game, set and match to the Middletons

Catherine, Duchess of Cambridge and her sister Pippa Middleton (L) watch from the Royal Box during the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London. (AFP)

Catherine, Duchess of Cambridge and her sister Pippa Middleton (L) (AFP)

Catherine, Duchess of Cambridge and her sister Pippa Middleton (L) react while watching the action from the Royal Box. (AFP)

Catherine, Duchess of Cambridge and her sister Pippa Middleton. (AFP)

Catherine, Duchess of Cambridge and her sister Pippa Middleton. (AFP)

Catherine, Duchess of Cambridge (centre right) and her sister Pippa Middleton (centre left) arrive in the Royal Box before the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London. (AFP)

Catherine, Duchess of Cambridge (R) and her sister Pippa Middleton (L) talk in the Royal Box before the men's singles final match between Britain's Andy Murray and Switzerland's Roger Federer on Centre Court on day 13 of the 2012 Wimbledon Championships tennis tournament at the All England Tennis Club in Wimbledon, southwest London. (AFP)

Catherine, Duchess of Cambridge (R) and her sister Pippa Middleton (AFP)

Catherine, Duchess of Cambridge (R) and her sister Pippa Middleton (AFP)