Tour king Wiggins goes for gold

Tour de France winner Bradley Wiggins bids to become Britain's most successful Olympian when he goes in the time trial race Wednesday, while Australia's James Magnussen looks for a first swimming gold.

Wiggins starts as favourite for the 44km time trial around London's Hampton Court Palace after winning both long time trials on the Tour.

The first Briton ever to win cycling's most prestigious race said he was determined to win Olympic gold after the host nation finished outside the medals in the road race on Saturday.

"Confidence is sky-high that we're going to be in the ballpark," said the 32-year-old, who is riding in his home city.

The main threat should come from defending champion Fabian Cancellara of Switzerland -- also a four-time world champion -- and Germany's reigning world champion Tony Martin, but both have had disrupted summers.

A medal of any colour would see Wiggins become the most decorated British Olympian in history as a seventh medal would put him one clear of rower Steve Redgrave, who has six.