"Since his Beijing victory, five more boxing clubs have sprung up and around 5, 000 children have taken up the sport, " says his father, Mahipal Singh.

BBC: Why India's boxers pack a punch at London 2012

The Swiss rider pulled out citing fatigue in the wake of his time trial victory in Beijing.

BBC: Cooke leads GB Worlds challenge

Second seeded Djokovic, who defended the China Open in Beijing on Monday, wrapped up victory over Croatia's Ljubicic in 80 minutes.

BBC: Rafael Nadal beats Stanislas Wawrinka in Shanghai

Lu, who beat Andy Murray at the 2008 Beijing Olympics, was understandably delighted and dedicated his victory to his late father, who passed away 10 years ago.

BBC: Wimbledon 2010: Andy Roddick crashes out to Yen-Hsun Lu

German runner Mikitenko missed Beijing through injury but followed up her return with victory in September's Berlin Marathon and last month was crowned the 2007-08 World Marathon Majors champion.

BBC: Radcliffe set for London return

That victory helped propel her into Britain's team for the Beijing Olympics, an learning experience she intends to build on come 2012.

BBC: 'New Paula' targets gold in 2012

As well as his 100m and 200m wins in Beijing, the 22-year-old Bolt led Jamaica's 4x100m sprint relay to Olympic victory in a record time of 37.10.

BBC: Bolt eyes world record domination

And after the disappointment of withdrawing from the Beijing Olympics last year, he feels he is learning quickly, as illustrated by his two-round victory over Walsall's Steve Saville last month.

BBC: Gavin targets title tilt in 2010

The victory means China has won gold in every table tennis event played at the London Games and in Beijing in 2008, according to the official Games website.

CNN: Olympics Day 12: Golden day for the U.S.

Vlasic was the only athlete to clear 2.04m for a victory that goes some way to making up for the disappointment of missing out on gold at the Beijing Olympics last summer.

BBC: Walker storms to 400m hurdle gold