The entire Tottenham Hotspur squad have requested heart checks following Fabrice Muamba's cardiac arrest at White Hart Lane on Saturday evening.
The Bolton Wanderers midfielder is currently in a critical but improving condition at the London Chest Hospital.
A number of Spurs players were visibly upset by the weekend's events, leading all the playing staff to ask sports cardiologist Sanjay Sharma to check for any defects.
"The players have all demanded cardiac screening today," she told Sky Sports News. "That involves taking a history relating to cardiac symptoms, which include chest pain during exertion or breath which is disproportionate to the amount of exercise being performed and blackouts, [and] asking about a family history because many of these conditions that can cause cardiac arrest are hereditary.
"We then perform a cardiac examination and following that we do an ECG, which is an electrical tracing of the heart which looks for electric faults of the heart and a cardiac ultrasound, which looks at heart muscle problems or problems with the heart values."
An update on Muamba's condition is expected to made later this evening.
