In connection with Thursday's semifinal against Bodö/Glimt – Tottenham won 3–1 – the 19-year-old was seen walking on crutches with his foot in an orthopedic boot.
And now it's clear why he did it.
He has strained the ligaments in his ankle, says Postecoglou and continues to develop that the season is probably over for the Swede.
The injury is so severe that he will be out for the rest of the season.
To Sky Sports, Tottenham coach Ange Postecoglou states that the injury is "a great disappointment" for Lucas Bergvall, who has made an immediate impact in his first season in the London club.
Four rounds remain of the Premier League and in the Europa League, Tottenham has one foot in the final, which is played on May 21 in Bilbao.
The Swedish national football team gathers later for two international matches in early June, away against Hungary and at home against Algeria.
