Pundits' picks: John Lloyd on day four

BBC pundit John Lloyd previews the big matches on day four at Wimbledon and picks out his favourites to progress to the third round.

In the men's draw, 2011 champion Novak Djokovic, number four seed David Ferrer, and 2009 US Open winner Juan Martin del Potro are all in action, while the women's draw sees reigning champion Serena Williams, Britain's number one Laura Robson and fourth seed Agnieszka Radwanska all competing on Thursday.

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