Buhl made it seven podiums in a row by finishing second in the opening race of the day before finishing in third in race eight. 

His ninth race brought his worst finish of the Championship so far - fifth place - which sits as his discarded race, not attributing towards his low points total of 15. 

His closest rival, France's Jean-Baptiste Bernaz, was black flagged on the seventh race but bounced back to win the eighth race and finish third in race nine, giving him a points total of 19. 

The front two are a solid distance in front, with challenges coming from Australia's Matt Wearn and Britain's Elliot Hanson.

Wearn took his fourth second place in the final race of the day, backed up by strong finishes in fourth and eighth. 

In race seven, Hanson finished third behind Norway's winner Hermann Tomasgaard and Buhl before finishing second behind Bernaz in race eight - only to be let down by a difficult race nine where he finished ninth. 

Tomasgaard's win in race seven started his best day so far, backed up by fifth- and ninth-place finishes later taking him up to ninth overall and with an outside chance of a medal going into the final day. 

Sweden's Jesper Stalheim had his worst two finishes in race seven and eight, coming 10th and 22nd, before winning the final race of the day ahead of Wearn and Bernaz. 

Australian Luke Elliott is in fifth ahead of Croatia's Tonci Stipanovic, Stalheim is seventh and New Zealand sailor Sam Meech rounds off the top eight. 

The final day, due to a postponement on day four, will see another three races, concluding the event and determining who will claim the title.