Ethan Strand pulled off the shock of the season to win the men's 1500m at the Kamila Skolimowska Memorial, while Mykolas Alekna's monster discus led a flood of records and world leads in Chorzów.

Jakob Ingebrigtsen's return to Diamond League 1500m racing did not go to plan – and nor did anyone else's, with Ethan Strand producing the shock of the season to win in Chorzów on Sunday (Aug 23).

The 23-year-old American was only 11th at 800m but produced a huge last lap to win his first career Diamond League title in 3:30.77. Phanuel Koech was second in 3:31.14, edging out Olympic champion Cole Hocker, who was third in 3:31.16. Ingebrigtsen, racing over 1500m for the first time since Tokyo last September, was fourth in 3:31.19 after having led at the bell and down the back straight on the last lap.

It capped an afternoon of wall-to-wall records at the Kamila Skolimowska Memorial, with seven meeting records and two world leads set in total.

Mykolas Alekna produced the standout performance, smashing his own Diamond League discus record with 72.58m. The Lithuanian cleared 71m three times during the competition, capping it with a fifth-round effort that was almost a full metre further than his previous series record – and the longest throw outside of Ramona, Oklahoma in two decades.

There was a piece of sprint history too, as Oblique Seville won the men's 100m in 9.83 (1.4) ahead of Kenny Bednarek (9.87), with all nine finalists breaking 10 seconds for the first time in the event's history.

Collen Kebinatshipi stormed to a world-leading 43.59 in the men's 400m.

Alison dos Santos beat Karsten Warholm for the third time this season in the men's 400m hurdles, clocking a world-leading 46.43. In the men's 3000m steeplechase, Ethiopia's Gemechu Godana produced a surprise of his own, beating Soufiane El Bakkali with a meeting record of 8:02.74. Ja'Kobe Tharp bounced back from a disappointing outing in Lausanne two days earlier to win the 110m hurdles in 13.05 (-0.7), leading home an American sweep of the top four ahead of Trey Cunningham (13.08), Jamal Britt (13.09) and Cordell Tinch (13.22).

In the women's 1500m, Tsige Duguma ran down Jessica Hull with a stunning last 100m to win in a world-leading 3:55.06, with Hull second in 3:55.20 and Dorcus Ewoi third in 3:55.58. World record-holder Yaroslava Mahuchikh equalled her own meeting record of 2.00m in the high jump.

Melissa Jefferson-Wooden continued her two-year unbeaten run in the 100m, winning in 10.78 (0.6) – her only defeat over the distance in that time came when she took Olympic bronze in Paris.

Nadia Battocletti, fresh from retaining her European 5000m and 10,000m titles in Birmingham, produced another clinical kick to win the 5000m in 14:54.09 in a tactical race, beating double world indoor champion Freweyni Hailu (14:54.62) and Commonwealth 5000m and 10,000m champion Rose Davies (14:55.39).

Saly Sarr won the women's triple jump with a Senegalese record of 15.08m.

Records at the Saturday city event

The Kamila Skolimowska Memorial began a day early with two Diamond League disciplines at Katowice Market Square. Alyssa Jones and Agate de Sousa both leapt a meeting record 6.98m in the women's long jump, with Jones taking victory on countback. Monaé Nichols was third with 6.95m and Jazmine Sawyers fourth with 6.84m, though neither result was enough to secure a Diamond League final spot, with Larissa Iapichino, Malaika Mihambo, Claire Bryant and Hillary Kpatcha instead taking the qualifying places.

In the men's high jump, Gianmarco Tamberi cleared 2.31m on his third attempt – having also had solid attempts at 2.35m – to beat Romaine Beckford, who cleared 2.29m, and secure a Diamond League final spot. Matteo Sioli, Oleh Doroshchuk, Mateusz Kolodziejski and Erick Portillo also qualified.

In the non-Diamond League women's shot put, Chase Jackson set a meeting record and season's best of 20.92m ahead of world champion Jessica Schilder (20.22m).