The athlete training session for the Olympic marathon swimming in the River Seine went ahead on Wednesday morning.
Despite breaking his own national record, South African sprinter Akani Simbine missed yet another chance to secure his first major international medal.
Akani Simbine ended in fourth place in a massively tight Olympics men's 100m final at Stade de France on Sunday night.
South African sprinter Akani Simbine has qualified for a third straight Olympic 100m final.
Carlos Alcaraz brushed aside Felix Auger-Aliassime 6-1 6-1 to move within one victory of the Olympic singles gold medal.
Slovakian swimmer Tamara Potocka required medical attention after collapsing immediately following her heat in the women's 200 meters individual medley on Friday morning.