Adam Peaty has delivered a chilling warning to his breaststroke rivals by hinting he can go even quicker over 50 metres than the 25.95 seconds he achieved at the FINA World Championships.
Peaty has been in sensational form in Hungary as he retained his 100m and 50m breaststroke titles with ease, the latter taking his haul at World Championships to five on Wednesday.
In his 50m heats 24 hours earlier Peaty broke new ground in the event as he became the first man to go under 26 seconds, his semi-final time breaking the world record he had set in his previous race at the meet.
He was unable to go faster in Wednesday's final but he was under 26 seconds again with a time of 25.99s comfortably giving him gold.
"I'm so, so happy with my performances here," the 22-year-old told BBC Sport.
"I've got two 25-points [times of 25 seconds] now and I know there's more in that 50 but I don't want to spoil it for next year or the year after."
My Fifth World Title Tonight, speechless. Thank you so much! pic.twitter.com/DfvYypTztV-- Adam Peaty (@adam_peaty) July 26, 2017
Two years ago in Kazan, Peaty also added the 4x100m mixed medley to his haul, but he could not repeat the feat in 2017 as Great Britain came fourth.
Peaty was on the second leg of the relay for his team but along with Georgia Davies, James Guy and Siobhan O'Connor they narrowly missed out on a medal.
Gold went to the United States as Simone Manuel led home a quartet completed by Matt Grevers, Lilly King and Caeleb Dressel.
Australia took silver, while Canada and China shared bronze after both stopping the clock on 3:41:25.