Friday's three back-to-back races will decide the 2023 Topper 5.3 World Champion at Royal Cork Yacht Club.
Although Great Britain's Alex Jones has established a winning point cushion of 12-points over six races (with two race wins), it is still all to play for going into the final day in Cork Harbour.
Thursday's penultimate day of the Topper World Championships was a long day on the water in Cork Harbour Photo: Bob Bateman
Jones's teammate Rory Clow of Island Barn Reservoir Sailing Club has moved up to second on 25 points, with China's Shiyin Niu from the Beijing Sailing Centre now third on 33 points.
Just two points off the podium is the best of the Irish squad Luke Simpson of County Antrim Yacht Club.
Day Four 2023 Topper World Championships Photo Gallery By Bob Bateman
See results below