Great Britain's Adam Peaty shattered the 100 metre breaststroke world record with a blistering time of 57.55 seconds in his heat at the Olympic Games on Saturday.
The 21-year-old, winner of three gold medals at the World Championships last year, made a huge statement to his rivals in the sixth and final heat at the Olympic Aquatics Stadium.
Peaty touched the wall over a second ahead of second-placed Jake Packard, smashing his own previous world record of 57.92secs to book his place in the semi-finals in style.
The Englishman went out in 26.69secs and did not let up, spurred on by a raucous crowd in his first race as an Olympian.
He told BBC Sport: "I've shown a bit of a hand. I've practiced that front end for a quite a while now and I heard the crowd screaming as I got towards the wall, so I thought 'there's something dodgy going on here!'
"I just enjoyed it, it's my first Olympic Games - I'm officially an Olympian now. It's great to get out here and enjoy the atmosphere."
Peaty will be back in the pool for the semi-finals over the same distance later on Saturday.