it looks that it's not Van Niekerk himself to have covid-19, but one of the members of the small South African team training in Gemona (near Trieste) in this period...
therefore, it's well possible that all the SA athletes announced at the start of today's meet won't be able to participate (even if they're desperately trying to save at least Van niekerk's presence, by isolating him from the rest of the team and making him a second test this morning after the one he sustained last night (no news about the result of that one, yet)...
by the way, today on one of the main Italian newspapers (La Repubblica), they published a beautiful interview with Van Niekerk...
of course it's in Italian, but google translate should do a decent work also for those who don't speak our language, though...
https://www.repubblica.it/sport/vari/2020/07/31/news/intervista_van_niekerk-263377058/?ref=RHPPTP-BS-I263367605-C12-P12-S2.4-T1
back to today's meet in Trieste, this is the schedule of events (all times CET, in UK -1 hour, in the US East Coast, -6 hours) with the most notable athletes on paper in each event:
17.35: Women's 100m (Heats) - Tatjana Pinto (GER)
18.05: Men's 100m (Heats) - Marcell Jacobs (ITA), Sean Safi-Antwo (GHA)
18.15: Men's Triple Jump - Pablo Torrijos (ESP)
18.25: Men's Pole Vault - Thiago Braz (BRA)
18.40: Men's Shot Put - Leonardo Fabbri (ITA)
18.50: Men's 110HS - Andrew Pozzi (GBR) and all the best Italians (Lorenzo Perini, Hassane Fofana, Paolo Dal Molin)
19:00: Women's 100HS - Luminosa Bogliolo & Elisa Di Lazzaro (ITA), Katharina Johnson-Thompson (GBR)
19:00: Women's High Jump - Elena Vallortigara & Alessia Trost (ITA)
19.10: Women's 800m - Laura Muir & Jemma Reekie (GBR), Renelle Lamote (FRA), Selina Buechel (SUI)
19.25: Men's Long Jump - Filippo Randazzo (ITA)
19.25: Men's 100m (Final)
19.35: Women's 100m (Final)
19.45: Women's 400m - Raphaela Lukudo (ITA)
20.00: Men's 400m - Luka Janezic (SLO), Samuel Garcia (ESP)
and waiting news about Van Niekerk and the other South Africans and their covid-19 tests...