Wimbledon 2014: Will Rafael Nadal be upset by Lukas Rosol gain?
Legendary tennis coach and BBC Radio 5 live pundit Nick Bollettieri casts his eye over the key matches on day four at Wimbledon.
Rafael Nadal faces Lukas Rosol, to whom he lost a five-set thriller in 2012 at the same stage of the tournament, at 13:00 BST on Centre Court on Thursday.
Bollettieri also offers his thoughts on Heather Watson v Angelique Kerber and Serena Williams v Chanelle Scheepers.
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