Cowan: Tommy Haas could knock Novak Djokovic out of Wimbledon

I mentioned on Saturday morning that Novak Djokovic had not yet found his best form at Wimbledon - but that changed with his demolition of Jeremy Chardy.

Barry Cowan is raising money for the charity Have a Heart throughout Wimbledon with his Sky Bet Charity Bets. Find Barry's top daily and outright tips here.