Graeme Souness feels it will be 'difficult' for Christian Eriksen to resume his football career after suffering a traumatic cardiac arrest while playing for Denmark in their Euro 2020 opener last week.
The sporting world came together in unity after watching the Inter Milan playmaker collapse to the turf shortly before half time in their game against Finland - with players, fans and coaches on the pitch visibly shaken as medics fought to revive him.
Thankfully the former Tottenham star was brought back with just one defibrilator shock before being taken to hospital for further tests and examinations - with Denmark later confirming he was in a 'stable' condition.
The Danish team played just their second game since the incident against Belgium on Thursday, with fans and players coming together to pay tribute to the 29-year-old as he continues his recovery, and Souness said his recuperation was 'incredible'.
Souness himself has battled heart problems - he suffered a heart attack in 2015 and underwent a triple-heart bypass in 1992 at the age of 38.
He is now an ambassador for the British Heart Foundation and hailed the work research being done to improve heart conditions and care for those who suffer, but believes Eriksen faces a tough task to return to the pitch.
'It's incredible,' he told ITV before Denmark kicked off against Belgium. 'I'm ambassador for British Heart Foundation, the research they do, they keep improving the techniques, they do an incredible job.
'Heart disease is the biggest killer in the country, It impacted me - it happened 29 years ago, i'm still sitting here. Looking what happened to [Eriksen], it will be difficult for him to play again. He just keeled over. We hope he does play again but it will be very difficult.'
He added: 'That could happen putting the bins out, cutting the grass. It doesn't have to be exertion. He's unlucky but lucky.'
Nadia Nadim - a former Danish women's international - agreed that Eriksen was 'unlucky', but believes he could not have suffered a cardiac arrest in a better place with the amount of medical staff present in the stadium.
'The incident was unlucky but if you flip it around and think about it, it couldn't have happened in a better space,' she said.
'He's in the field with all the medical staff around him, the fast reaction of them and the team-mates, Simon Kjaer, to make sure he didn't swallow his tongue made sure he was back very quickly.'
Belgium and Denmark players both applauded Eriksen on the pitch during their Euro 2020 group stage game, with the ball being booted into touch in the 10th minute to pay homage to the Danish No. 10.
It comes after the doctor who helped revive Eriksen has revealed the player's first words after regaining consciousness.
German Jens Kleinefeld was one of the first people on the scene at the Parken Stadium and helped deliver an electric shock that restarted the 29-year-old's heart.
Eriksen, who will have a heart-starter fitted after his cardiac attack was caused by 'rhythm disturbances', had CPR on the pitch for 13 minutes.
Kleinefeld told Fox Sports: 'About 30 seconds later, the player opened his eyes and I could talk to him directly.
'That was a very moving moment, because in such medical emergencies in everyday life, the chances of success are much lower.'
Kleinefeld revealed he then asked Eriksen: 'Well, are you back with us?' and Eriksen replied: 'Yes, I am back with you. For f***s sake, I'm only 29 years old.'
On Monday, Eriksen also thanked fans for their support and concern, and vowed to get to the bottom of why he experienced such a sudden and serious health emergency in a short statement released to Italian newspaper Gazzetta dello Sport via his agent.
Eriksen's statement read: 'Thank you, I won't give up. I feel better now - but I want to understand what's happened.
'I want to say thank you all for what you did for me.'