Sjostrom claim 4th 100 butterfly gold at worlds
Sarah Sjostrom of Sweden became the first woman to win four gold medal in the women's 100-meter butterfly following her victory in Monday's final at the FINA world championships in Budapest.
The 23-year-old clocked 55.53 seconds, a new championships record, just 0.05 seconds from her own world record set at the Rio de Janeiro Olympics last year.
She is the first reigning Olympic champion to add the world title in the event.
Australia's Emma McKeon took silver at 0.65 seconds back with Kelsi Worrell taking bronze at 0.84.
Sjostrom broke the 100 freestyle record on Sunday when she became the first woman to swim under 52 seconds.
Sjostrom first won the 100 butterfly title as a 15-year-old at the 2009 championships in Rome.
She failed to defend it in 2011 in Shanghai, but took gold again at both the 2013 championships in Barcelona and then again two years ago in Kazan, Russia.
Also, Britain's Adam Peaty missed out on his own world record when he defended his men's 100 breaststroke title earlier on Monday.
Peaty clocked a new championships record of 57.47 with Kevin Cordes of the United States second at 1.32 back with Russia's Kirill Prigoda third at 1.58.
Peaty had targeted his own world record of 57.13, set when he won the Olympic title last year in Rio de Janeiro, but came up short in his bid.
Nevertheless the 22-year-old was delighted to defend the world title he first won in Kazan two years ago.
"A lot of hard work goes into competing and the crowd were amazing, I want to thank everyone out there," Peatty said after his win.