Ireland's Sonar trio of John Twomey, Austin O'Carroll and Ian Costelloe are in 13th position after 10 races following a pair of 12th place finishes in Friday's racing.

Having begun the day 11th in the overall standings, the Irish boat made a decent start to Race 9 of the 11-race series but fell back in the second half of the race to cross the line in 12th.

The second race again saw Ireland towards the back of the field, with another 12th-place finish dropping them two places in the rankings ahead of tomorrow's medal race.

Australia are now virtually assured of the gold medal after a superb display saw them finish second and first in the day's races.