Caster Semenya opened the weekend in style, paving the way for a busy three-day period for South African athletes on the IAAF Diamond League circuit.
Semenya stormed to victory in 1:54.60, clocking the second-fastest 800m time of her career at the 10th leg of the series in Monaco on Friday night.
The world champion earned a convincing win, finishing well-clear of Burundi's Francine Niyonsaba, in second place in 1:55.96.
The nation's elite sprinters struggled to put up a challenge, however, with Carina Horn taking seventh place in the 100m women's race in 11.21 seconds and Luxolo Adams ending seventh in the 200m men's in 20.65.
With the IAAF Diamond League series moving on to London, England, a total of eight South African athletes are set to compete at the 11th leg of the campaign on Saturday and Sunday.
On Saturday's opening session of the two-day meeting in the English capital, sprinter Akani Simbine (100m), javelin throw Sunette Viljoen, 400m hurdler Wenda Nel, race-walker Lebo Shange (3 000m walk) and double amputee sprinter Ntando Mahlangu (T61 200m) are all in the start lists.
Long jumpers Luvo Manyonga and Ruswahl Samaai are scheduled to compete on Sunday, along with 110m hurdler Antonio Alkana.