Mathieu van der Poel and Chloe Woodruff of the United States were the victors in the short track races at the International Cycling Union (UCI) Mountain Bike World Cup event in Nové Město na Moravě.
Dutchman van der Poel recorded the winning time of 20:49secs on the second stage of the cross-country season in the Czech town.
He was given top spot ahead of France's Maxime Marotte, who finished in the same time.
Brazil's Henrique Avancini took third place in 20:50.
Woodruff triumphed in the women's race with 22:08.
Second place went to Britain's Annie Last in 22:16, beating Switzerland's Jolanda Neff in a photo finish.
The short-track format event has only recently been included by the UCI on the World Cup circuit.
The competition continues tomorrow with the Olympic-distance races.