Premier League players are reportedly concerned that recent on-field heart problems are a possible consequence of taking the Covid-19 vaccine.
There have been a number of recent high-profile incidents involving players enduring heart problems on the field - including Christian Eriksen who collapsed due to a cardiac arrest at the European Championships and Sergio Aguero who was forced into retirement after he was diagnosed with heart arrhythmia.
The worrying spate of heart-related episodes in football has raised concerns over links with Covid and the vaccination programme to prevent it.