British swimmer Adam Peaty claimed a new world record in the 50m breastsroke at the World Aquatics Championships, despite saying he "wasn't even up for it that much".
The Olympic champion shaved 0.32 seconds off the record he set two years ago, a day after retaining his 100m breastsroke title.
And the 22-year-old believes he could do even better in Tuesday evening's semi-final or Wednesday's final in Budapest, as he had not prepared to produce his best race in the heats.
"This morning I came in nice and relaxed," he said.
"I wasn't even up for it that much so it is crazy. I wanted the world record but I don't know if I wanted in the heats. You can't pick and choose but I am so grateful to be in front of that crowd.
South African Cameron van der Burgh, a former world record holder in the 50m, was second fastest with a time of 26.54.
The 2012 Olympic champion, who withdrew from the 100m race in order to focus on the 50m, warned Peaty not to get ahead of himself.
"It's a good time, but gold medals aren't won in the heats," Van der Burgh said.
"We know what he's capable of now. He's shown all his cards. But it's a great swim nonetheless."