Johannesburg - South Africans Ofentse Mogawane, Hannes Dreyer and Mapaseka Makhanya dominated their respective races in perfect weather conditions at the Pfingstsportfest athletics meeting in Rehlingen, Germany, on Monday.
Dreyer coasted into the final of the men’s 100 metres after winning his heat in 10.41 seconds.
He went on to win the final in 10.34, holding off Ronalds Arajs of Latvia by 0.07 seconds.
Mogawane, meanwhile, secured victory in the men's 400m race in 45.80, his second fastest time of the season.
The 30-year-old needs to clock 45.30 in order to reach the Olympic qualifying standard and will get another opportunity when he runs in the Meeting de Marseille in France on Thursday.
Great Britain’s Richard Buck finished second in 45.92.
Makhanya outclassed the German duo of Elina Sujew and Annett Horna to win the women's 1 500m event in four minutes, 12.01 seconds (4:12.01).
Johan Cronje crossed the line in fourth place in the men's 1 500m in 3:37.07.
Wenda Theron was fourth in the women's 400m hurdles race, clocking 56.29, and Estie Wittstock finished fifth in the flat one-lap sprint in 52.77.