of Serbia won his 4th round match at Wimbledon against former champion Lleyton Hewitt of Australia in 4 sets, 7-5 6-4 3-6 6-4.
Hewitt won Wimbledon back in 2002 when he beat David Nalbandian in the final in straight sets and he has been in good form lately however.
The Australian beat Roger Federer 2 weeks ago in 3 sets in the final of the ATP Event in Halle Germany and he will now be looking to bounce back for the US Open.
Djokovic made the Semi Final of Wimbledon in 2007 but he lost to Rafael Nadal.
Djokovic has won 1 Grand Slam in his career so far that was at the Australian Open in 2008 where he beat Jo Wilfred Tsonga of France in the final in 4 sets.
The Serb also won the Masters Cup in Shanghai, China back in 2008 beating Nikolay Davydenko of Russia in the final.