The Danish footballer is recovering in hospital after collapsing around 40 minutes after the game started against Finland in Copenhagen on Saturday.
The player’s agent and friend Martin Schoots said he spoke to the 29-year-old attacking midfielder, as La Gazetta reported in Italy.
“He joked, he was in a good mood, I thought he was good,” he said.
“We all want to understand what happened to him, he wants to do it too: the doctors are doing in-depth examinations, it will take time. “
Mr Schoots added that messages had reached the Inter Milan star from all over the world and that his partner and parents were with him in hospital.
The player’s condition remains stable, according to an update provided by Danish football officials on Monday.
Jakob Hoeyer, communications director of the Danish Football Association, said: “We are in contact with him. We were in contact with him yesterday and today.
“(His) condition is the same as yesterday, stable, good. “
Danish team doctor Morten Boesen revealed that first tests on the drive “So far it’s going well” and added that Eriksen “was gone” before the resuscitation efforts began.
Mr Boesen said: “How far were we? I do not know. We got it back after a defib, so it’s pretty quick. “
“We have no explanation why this happened. “
Scotland captain Andy Robertson said Danish players were ‘heroes’ for shielding Eriksen from the crowds and cameras when he received CPR on the pitch after collapsing in the 42nd minute.
“The way the Danish players handled what must have been a heartbreaking thing for all of them, they resisted,” said Robertson.
“This will be the photo I remember and everyone should remember it because when one of their friends was in a bad place, they stood up and protected him.
“Whatever else happens in this tournament, for me they will be the heroes. ”