Karsten Warholm is looking to break the 400m hurdles world record at the Czech Golden Spike meeting on Tuesday, two weeks after trailing the three decades old mark by just 0.09sec.
On August 23, the 24-year-old Norwegian ran 46.87 seconds at the Diamond League in Stockholm, setting a new European record.
It was the second fastest time in history after Kevin Young's 46.78 seconds from the Barcelona Olympics in 1992.
Warholm was a late addition to the start list for the Golden Spike meeting in the eastern Czech steel hub of Ostrava as the organisers only confirmed his name last Wednesday.
"We are very serious about the Covid-19 precautions, so that has been an important issue," said Warholm.