Congratulations to Leendert Koekemoer clocking a personal best and setting a new South African under 20 record of 44.52 to win the men’s 400m at the Grand Prix Brescia in Italy.
Leendert Koekemoer beat Dutch record holder Jonas Phijffers, who ran 44.61, and Australia’s Reece Holder in 44.63. Letsile Tebogo of Botswana was eighth in 45.34.
That is a South African under 20 record taken down by 0.42 of a second, and it was his own mark he pulled apart. Koekemoer ran 44.94 at the SuperSport Simbine Classic at Pilditch Stadium in April, becoming the first South African junior in history to break 45 seconds.
Four months later he has moved the line again, and this time he did it against a field stacked with senior international 400m runners at the Stadio Gabre Gabric.
The entry list told you what he was walking into. Tebogo arrived with a 44.29 personal best and a 44.37 season’s best. Holder won this meeting in 2025 in 44.54. Phijffers came in off the European Championships holding a 44.41 best for the year.
Koekemoer was the youngest man in the race and carried the slowest personal best on the sheet at 44.96. He left with the win.
“He’s a 19 year old competing against senior world-class 400m men, and he wins the race outright — this kid is gonna be a problem!” – Jay
The Brakpan athlete has been building towards this all season. He runs out of the University of Johannesburg under Lyle Wentzel, having switched from Lindi du Plessis at Boksburg Stadium when he joined UJ at the start of the year.
His training group includes Udeme Okon, the 2024 World U20 400m champion, which means the standard he measures himself against every day is already a global one.
The 2026 season has given him plenty. He went under the 45-second barrier in April to seal his place at the World Athletics U20 Championships. He was part of the South African men’s 4x400m squad at the World Athletics Relays in Gaborone. And in Eugene he took bronze in the World U20 400m final in 44.96, running through the line in a race he had openly said he wanted to win.
He did not get gold in Oregon. What he has done since is more telling than any medal from that night.
The senior credentials were already there. Koekemoer ran a 44.23 split in the final of the men’s 4x400m at the 2025 World Athletics Relays in China, where South Africa took gold and set a national record of 2:57.50.
At the World Athletics Championships in Tokyo he ran in the heats of the men’s 4x400m, helping the team into a final they finished with bronze. He has a senior world medal to his name and he is still eligible for junior competition.
The Italian run changes what he is in the conversation. A 44.52 in an individual open 400m is not a junior mark with an asterisk next to it.
It is a senior-standard performance that happens to have been produced by an athlete who is still nineteen, and it came in a straight fight rather than a relay leg with a rolling start.
South Africa’s one-lap depth has been the story of this athletics season and Koekemoer is the youngest part of it. Lythe Pillay and Okon have carried the flag in recent global finals. Mthi Mthimkhulu ran 45.17 in the same Pretoria meeting where Koekemoer first went under 45.
The pipeline is not thinning out. It is getting faster at the bottom.
What this adds is proof under pressure. Taking Phijffers by 0.09 and Holder by 0.11 in a World Athletics Continental Tour Silver field means holding form through the last 80 metres against men who close hard, and doing it away from home on a European track.
Tebogo finishing eighth in 45.34 says the rest of the race was not soft either. The Botswana star has a 44.29 best and came in with the quickest season’s best in the field.
Koekemoer beat that field from the slowest credential in it.
He turns 20 in May, which gives him one more window of junior eligibility before he moves permanently into senior ranks. On this evidence the transition is already done in everything but the paperwork.
