China’s Aichen Wang was the sole race winner on the opening day of Sailing World Cup in Weymouth and Portland ©World Sailing

China’s Aichen Wang was the sole race winner on the opening day of Sailing World Cup in Weymouth and Portland as light winds plagued the venue of the London 2012 Olympic sailing competition.

Racing was scheduled to begin at 11am local time but a distinct lack of breeze left racers stuck ashore.

As several classes were postponed late in the day, the RS:X and 49er fleets got out into Portland Harbour at 4pm but only the men's RS:X completed a race.

The victory went the way of Wang and he was followed by Germany’s Toni Wilhelm and fellow Chinese Chunzhuang Liu.

"It was a light and shifty one," said Wang's coach Tom Ashley, the men's RS:X gold medallist at the Beijing 2008 Olympic Games.

"Aichen got a good start and then it was a little bit of a procession after that."

Only the men's RS:X completed a race today
Only the men's RS:X completed a race today ©World Sailing

Wang is ramping up his preparations for the Rio 2016 Olympic Games with Ashley adding: "We are here, partly for the event and partly for the training.

"It's still reasonably early in our racing phase so he's not very sharp, but that's okay.

"We aim to use this to sharpen him up and hopefully look towards a couple months' time."

Wang put his name into the hat as a serious Rio 2016 contender last year as he took gold at the Olympic test event, which often acts as the dress rehearsal for the main event.

Along with women's RS:X compatriot, Peina Chen, the 31-year-old was nominated at the National Sports Awards in China for his achievements.

Racing is due to resume tomorrow and conclude on Sunday (June 12) with the medal races.