The teenage midfielder promises revenge for his nation's World Cup defeat to the Dutch in South Africa, while Danish legend Peter Schmeichel admitted it is a tough test
The Danish were drawn against the Netherlands, Germany and Portugal in Group B, meaning Eriksen could be going head-to-head with team-mates such as Gregory van der Wiel, Vurnon Anita and Siem de Jong.
"Revenge against Holland is coming. Go Denmark!" the 19-year-old announced on his Twitter page, referring to his side's 2-0 loss to the Dutch in the 2010 World Cup.
He later tweeted at Ajax and Netherlands full-back Gregory van der Wiel, saying: "You don't have a chance against Portugal!"
Peter Schmeichel, who won Euro 1992 with Denmark, was less bullish about his nation's chances of progression.
"Oh my god what a tough draw. Holland, Portugal AND Germany," the 48-year-old announced via Twitter.
The Netherlands and Denmark will play each other in Kharkiv on June 9, before going on to face Portugal and Germany in the remaining Group B fixtures.