Lleyton Hewitt causes Marin Cilic upset

Australia's Lleyton Hewitt has defeated Croatian 13th seed Marin Cilic to reach round three of the men's Olympic singles at Wimbledon.

The former Wimbledon and US Open champion needed just a single break to take the first set from his opponent 6-4.

The 31-year-old caused one of the surprise results of the tournament so far with a 7-5 victory in the second.

Hewitt will meet Novak Djokovic in the next round after the Serbian second seed beat American Andy Roddick in straight sets.