We came across this video on Facebook:

The video shows a tennis player, later identified as Slovenian Dalila Jakupovic on the ground, with the post claiming that vaccinated tennis players are dropping like flies. The caption goes on to say that once vaccinated people put pressure on their hearts, the adverse effects of the vaccine begin to kick in.

When we conducted research on the authenticity of this claim, we found that while there was no mention of the vaccine from official sources, the video had in fact predated the COVID-19 pandemic entirely, having been published on 14 January 2020 by British newspaper The Guardian. For context, the World Health Organization (WHO) had described COVID-19 as being a pandemic around two months after the video, on 11 March 2020.

According to the caption on the video posted by The Guardian, the collapse was attributed to the poor air quality in Melbourne, caused by surrounding bushfires. These bushfires were widespread, having burned over 17 million hectares of land and lasted from September 2019 to March 2020.

Based on the evidence found then, it is false that a tennis player had collapsed due to the Covid-19 vaccine in the Australian Open.