Petchy's picks for day three at SW19

Andy Murray's former coach Mark Petchey predicts Novak Djokovic and Maria Sharapova will triumph on day three at Wimbledon, while Britain's Heather Watson will take advantage of her home turf and beat Jamie Lee Hampton.

Defending champion Djokovic faces American Ryan Harrison on Centre Court, while women's top seed Sharapova plays fourth seed Tsvetana Pironkova on Court One.

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