Kenya's Eliud Kipchoge, the Olympic marathon champion and world record holder, sent a warning to his rivals ahead of this year's Tokyo Olympics by cruising to victory in the NN Mission Marathon in Enschede, the Netherlands on Sunday.
It was his first outing since a shock defeat at October's London marathon, where he finished in eighth place.
Jonathan Korir of Kenya was second with a personal best of 2:06.40.
Great Britain set to be stripped of Olympic 4x100m relay silver after Ujah's 'B' sample positive
In the women's race, Germany's Katharina Steinruck prevailed with a personal best 2:25.59 ahead of Portugal's Sara Moreira in 2:26.42 and Rabea Schoneborn (2:27.03).
Considered one of the greatest ever marathon runners, Kipchoge suffered his first defeat since 2013 in London. The 36-year-old, who had previously won 10 straight races, suffered from a blocked ear that affected his breathing and cramp in his hip.
The Kenyan was at his dominant best in Enschede, however, going past the halfway mark in a little under 62 minutes before pulling away from Korir around the 95-minute mark to secure a comfortable victory.
The race was originally scheduled for April 11 in Hamburg but postponed over Covid-19 restrictions before being relocated.
"It's mission accomplished. Thank you to the great men and women who organised this race in less than 10 days," Kipchoge said. "It was in a different environment, in the midst of a pandemic to tell people you can still run.
"This was the real test towards the Tokyo Olympics, to test your fitness."
'Without prejudice' - Ujah teammate Hughes calls for 'fair' doping investigation
Team GB sprinter Ujah investigated over failed drugs test