Fukuoka = Yonhap) By Daeho Lee Australian swimming star Molly O’Callaghan, 19, has won four world championship titlesO’Callaghan was the first to touch the touchpad in 52.16 seconds in the women’s 100-meter freestyle final at the 2023 I nternational Swimming Federation World Championships at Fukuoka Marine Messe Fukuoka Hall in Fukuoka, Japan, on Monday.It was the fourth time O’Callaghan has stood on the podium at the Games, having previously won gold in the 200-meter freestyle, 400-meter freestyle relay and 800-meter freestyle relay. O’Callaghan is the first woman to win both the 100 and 200 freestyle events at a World Championships .O’Callaghan, who had previously set three world records at the event – in the 200m freestyle (1:52.85), 400m freestyle relay (3:27.96) and 800m freestyle relay (7:37.50) – did not make history in the 100m freestyle. O’Callaghan, who won three gold medals in Budapest last year, has now collected seven gold medals at the World Championships with his four golds .Siobhan He Hei (H ONG KONG) touched the touchpad in 52.49, 0.33 seconds behind O’Callaghan , sportstotozonecom to claim her first long course (50 meters) World Championships medal in silve r.Hei gave Hong Kong its first medal in Summer Olympic swimming history with silver medals in the women’s 100 and 200 freestyle at the Tokyo Olympics .Marit Steenberghen (NED) took bronze in 52.71.A new world record was set in the men’s 200-meter breaststroke. China’s Qin Haiyang was the first to touch the touchpad in 2:05.48, breaking the previous record of 2:05.95 set by Jack Stublett-Cook (AUS) in May last year.Qin Haiyang, who had earlier won gold in the 50 and 100 meters breaststroke and the 400 meters medley relay, joined O’Callaghan as a four-time winner at the event .Defending world record holder Stublett-Cook took silver in 2:06.40 and Matt Fallon (USA) took bronze in 2:07.74.In the women’s 200-meter breaststroke, Tokyo Olympic gold medalist Tatiana Skunmarker (SOU) took the top spot at the World Championships with a time of 2:20.80.Kate Douglas (USA) took silver in 2:21.23 and Tess Steen (NED) took bronze in 2:21.63..In the men’s 200-meter backstroke, Koss Herbert (HUN) won gold in 1:54.14, Ryan Murphy (USA) took silver in 1:54.83 and Roman Mittukov (SUI) took bronze in 1:55.34