Team South Africa on Sunday clinched the gold medal in the men’s 4x100m at the World Athletics Relays event in Silesia, Poland.
Akani Simbine led South Africa's 4x100m quartet to a dramatic victory.
Simbine, a sub-10 second 100m runner, took over the baton three metres down on Brazil's Paulo Andre Camilo de Oliveira but snatched victory on the line by a hundredth of a second in a time of 38.71sec.
The South African national mixed 4x400m team - Ranti Dikgale, Simon Khuzwayo, Deline Mpiti (woman) and Taylon Bieldt (woman) - were sixth in their heat in 3:19.18 on Saturday's opening day of competition and therefore did not qualify for a place in the final.
Meanwhile, Italy, Cuba and the Netherlands took gold at the 4 x 400 metres Relay event. Italy won the mixed 4 x 400 metres Relay event, and the woman's 4 x 100 metres event, while Cuba won the women's and the Netherlands won the men's.
Poland won the women's 4 x 200 metres event, as Germany won the men's 4 x 200 metres event. The first eight finishers in the 4x100m, 4x400m and mixed 4x400m events automatically qualify for the Tokyo Olympics.