Grossman, the 2021 bouldering world champion, was the only finalist to hit the first boulder W1, and despite needing two attempts to touch the second, claimed an impressive win with four tops and four zones.

Oriane Bertone of France took silver with two tops and four zones, with the podium completed by another home athlete in Brooke Raboutou, who finished with two tops and three zones.

In hot conditions at Pioneer Park the men’s boulder final proved a thrilling battle between two Japanese athletes as Tomoa Narasaki and Sorato Anraku.

Double world bouldering champion Narasaki took the victory, courtesy of requiring fewer attempts to get to the top and both climbers finished with four tops and four zones.

Narasaki reached the top in six attempts, while Anraku required 12, with the podium completed by Britain’s Toby Roberts, in his first boulder final, who ended with three tops and four zones.

In the women’s speed event, double world champion Aleksandra Mirosław claimed an eighth successive World Cup win, triumphing in a time of 6.43 seconds in the final.

The Polish athlete was faster in the semi-final, which she won in 6.39sec, but her final time was enough to take gold, from Indonesia’s Desak Made Rita Kusuma Dewi in 6.82.

Deng Lijuan of China completed the podium, with her time of 6.77, enough for bronze, as she defeated Indonesia’s Rajiah Sallsabillah.

Finally in the men’s speed category, Veddriq Leonardo of Indonesia claimed victory in 4.95, which was not quite as fast as his world record time of 4.90 at last month’s World Cup in Seoul.

A slip proved crucial for China’s Wu Peng, who was not able to recover from his error on the first part of the climb, as he finished in 6.99.

Kiromal Katibin, also of Indonesia, completed the podium, winning his race in a time of 4.98, to take bronze from Samuel Watson of the United States.

The next round of the Sport Climbing World Cup circuit is due to take place in Prague, Czech Republic, from June 2 to 4.