Christian Eriksen has released his first statement since his collapsing with cardiac arrest during Denmark's Euro 2020 clash with Finland last Saturday.

The 29-year-old Inter Milan ace said this morning: "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."

Eriksen's condition today has been described as stable and "good" by the Danish FA since his on-pitch collapse.

"We are in touch with him. We were in touch with him yesterday and today. (His) condition is the same as yesterday, stable, good," Jakob Hoeyer, communications director at the Danish football association, told reporters on Monday.

Eriksen's agent said the player is undergoing detailed examinations.

"We all want to understand what happened to him and he wants to as well. The doctors are doing some detailed examinations, it will take time," Italian newspaper Gazzetta dello Sport on Monday cited Eriksen's agent Martin Schoots as saying.

"Christian does not give up. Him and his family want to send everyone their thanks."

"We spoke this morning (Sunday). He was joking around and in good spirits, he was doing well," he added.

The messages of support for Eriksen have come pouring in, from within the game and beyond, something that Schoots said has helped cheer up the Dane.

"He was happy because he understood how much love he has around him," Schoots added. "He received messages from all over the world.

"He was particularly struck by those from the world of Inter Milan; not just from his teammates, who he heard from through texts, but also the fans.

"Half the world has contacted us, everyone is worried. Now he just needs to rest. His wife and parents are with him. But in any case he wants to support his teammates against Belgium."

Former Bolton Wanderers midfielder Fabrice Muamba said Eriksen's collapse brought back painful memories of his own cardiac arrest and that the Dane's toughest challenge in recovering from the incident will be a mental one.

Muamba, who collapsed on the pitch in an FA Cup match in 2012 and was technically dead for 78 minutes, said it took him more than a year to come to terms with the incident, which forced him to retire at the age of 24.

"It's too early to know about his physical health, but I can share something of the mental battle which, in many ways, is the toughest part of the journey ahead," Muamba wrote in his column for The Time.

"My advice is to take a step back and take all the time he needs because it will definitely affect him mentally, and his family.

"That worry plays in your head, whatever the doctors tell you. It's not easy to get over."

Muamba said Eriksen's team mates, who shielded him from the crowd and cameras as he received CPR on the field, would also need support.

"They didn't know if their friend was going to survive," Muamba added. "I thought the way the Denmark players surrounded him to protect him was amazing to witness."

Sanjay Sharma of St. George's University of London, Eriksen's cardiologist at former club Tottenham Hotspur, said the Inter Milan playmaker will have to decide if he wants to resume playing but strict federal laws in Italy might stop him.

"In Italy, the laws are very, very strict, and I understand that it would be against the law for him to now play competitive sport in Italy," Sharma said.

"Other countries are a little bit more liberal and respect the autonomy of the athlete, so at best he may get a defibrillator put in and be allowed to play in some countries.

"But in most situations like this, it's a career-ending situation."

Meanwhile, it has emerged Netherlands defender Daley Blind considered missing his country's opening game at the European Championship after the heart attack his former club team mate Eriksen suffered.

But Blind, who had heart problems himself last year, decided to take to the field and broke down in tears after being substituted midway through the second half of the 3-2 win over Ukraine in the Group C match on Sunday.

"Yesterday had a huge impact on me, never mind the fact that I know Christian well as a friend," Blind said of the drama in Copenhagen where Eriksen collapsed on the pitch during Denmark's match against Finland after suffering a heart attack.

"The situation for him is terrible. Of course, I have also experienced a few things in that area, so that I had to overcome a mental hurdle to play today," added the 31-year-old Blind, who was diagnosed with heart muscle inflammation in 2019 after he suffered a dizzy spell playing for Ajax Amsterdam in a Champions League game against Valencia.

He was fitted with a pacemaker that treats dangerously abnormal heart rhythms but it failed while he was playing in a friendly last August and he collapsed again - although it was later described as a one-off incident.