Gretchen Walsh shatters 100m butterfly world record in semi final race

The Paris Olympic Games may be more than a month away, but things are reaching boiling point in the pool between two rival nations.

The Paris Olympic Games may be more than a month away, but things are reaching boiling point in the pool between Australia and America.

After Australia’s swimming trials wrapped up, it was America’s turn to hit the lanes and they responded almost instantly.

Get on board Kayo and watch every game of every round of the NRL + AFL Seasons live and ad break free during play. New to Kayo? Start Your Free Trial Today >

Gretchen Walsh shattered the 100m butterfly world record in the semi-finals at the US Olympic trials where freestyle great Katie Ledecky punched her ticket to a fourth Olympics.

Walsh, coming off a record-setting collegiate season for the University of Virginia, clocked 55.18sec to eclipse the previous record of 55.48sec set by Sweden’s Sarah Sjoestroem at the 2016 Rio Olympics.

The 21-year-old is trying to make her first Olympic team after winning medley relay gold along with freestyle relay silver and 50m fly bronze at the 2023 world championships in Fukuoka.

She electrified the crowd of more than 20,000 at Lucas Oil Arena, home of the NFL’s Indianapolis Colts, in the first event of the opening finals session at the nine-day meeting - where only the top two finishers in each event can qualify for the Paris Games.

Walsh couldn’t believe it. Sarah Stier/Getty Images/AFP

American record-holder Torri Huske had made a run at Sjoestroem’s mark in the first semi-final, hitting 50m under world record pace before finishing in 55.79sec.

Walsh, who had never broken 56 seconds until she posted 55.94 in the heats on Saturday morning, then roared through the second semi-final, staring at the scoreboard in disbelief as the time flashed up.

“It’s such a surreal experience,” said Walsh, who emphatically shed her reputation as a short-course specialist.

“I don’t know when I’m going to be thinking I just did that. I’m trying to convince myself that that just happened - I’m just in awe.

“I’m ready for tomorrow night,” added Walsh, who will try to secure her place in the team for Paris in the final when the field will also include Tokyo Olympic medallist Regan Smith, who was third-fastest in the semis in 55.92sec.

The new world record holder. (Photo by Sarah Stier/Getty Images)

Meanwhile seven-time Olympic gold medallist Ledecky, who burst onto the international scene as a 15-year-old with her victory in the 800m free at the 2012 London Olympics, is Paris bound after winning the 400m freestyle in 3min 58.35sec.

Paige Madden, a finalist in Tokyo, was second in 4:02.08.

Ledecky’s time was her fastest since 2022. Even though she’s still the world’s dominant force in the 800m and 1500m free, the 27-year-old will arrive in Paris chasing Australian world record-holder Ariarne Titmus and Canadian teenager Summer McIntosh in the 400m free.

Titmus dethroned Ledecky in the 400m at the Tokyo Olympics and broke Ledecky’s longstanding world record in the event in 2022.

Ledecky is off to another Olympics. Sarah Stier/Getty Images/AFP

McIntosh broke the record last year before Titmus reclaimed the mark, and Titmus signalled her intentions for Paris with the second-fastest time ever - a blistering 3:55.44 - at the Australian trials.

Ledecky, who is also slated to swim the 200m at trials, counts six individual victories among her seven Olympic golds - more than any other female swimmer.

With two more golds she can surpass compatriot Jenny Thompson for most total Olympic gold medals including relays.

Aaron Shackell, a 19-year-old local favourite, was the first swimmer to secure a Paris berth, winning the men’s 400m free in 3:45.46.

Shackell held off a late charge from Tokyo bronze medallist Kieran Smith, who finished second in 3:45.76.