Debrunner, who won gold and bronze at the Tokyo 2020 Paralympics, continues to strengthen her position as the rising new star of Swiss wheelchair racing.

It looked briefly as if another Paralympic champion, Sherman Isidro Guity Guity of Costa Rica had equalled the men’s T64 100m world record when he matched the time of 10.61sec set by Richard Browne in Doha seven years ago, but the performance was annulled for record purposes because of an excess wind reading.

Mauritania’s Marie Alphonse won a tight T54 women’s 400m race in 56.13 from home racer Patricia Eachus, who clocked 56.27, and Britain’s Melanie Woods, who recorded 56.41.

In the men’s races, Switzerland’s multiple world and Paralympic champion Marcel Hug, who had narrowly missed setting a world record in the previous day’s T54 men’s 800m, earned another outstanding win as he finished the T53-54 men’s 5,000m in 9min 51.97sec from Britain’s Daniel Sidbury, who clocked 9:54.01.

In the men’s T13 400m Japan’s Ryota Fukunaga narrowly defeated Germany’s Max Marzillier, 50.21sec to 50.24.

Walid Ktila of Tunisia won the men’s T34 400m in 50.00 from Australia’s Rheed McCracken who clocked 50.96.

Sidbury did get gold on the day as he won a highly competitive men’s T54 400m, clocking 47.14, in front of compatriots Nathan Maguire on 47.19 and Richard Chiassaro on 47.72.