Emilios Monos of Greece and Ireland's Eve McMahon took the lead in the boys' and girls' events, respectively, after the second day of racing at the International Laser Class Association Laser Radial Youth World Championships in Canada.
Denmark's Anne-Marie Rindom held on to her overnight lead to win gold at the Laser Radial Women's World Championship in Japan.
Olympic bronze medallist Anne-Marie Rindom has regained the lead at the Laser Radial Women's World Championship after the penultimate day of racing in Japan.
Ecem Güzel of Turkey is the new leader at the Laser Radial Women's World Championship after the fourth day of action in Japan.
Sweden's Josefin Olsson kept hold of her lead after day three of the Laser Radial Women's World Championship in Japan.
Racing begins tomorrow across nine classes at the Youth Sailing World Championships in Gdynia.
Oskari Muhonen steered Finland to their first gold medal of the Summer Universiade by leading his crew to first place in the mixed fleet sailing competition.
International University Sports Federation (FISU) Sailing Technical Committee chairman Andy Fethers has called for more sailing at the Summer Universiade in a bid to encourage students to continue with the sport.