Johann Berg Gudmundsson has suffered a tear to a calf muscle, according to the Iceland management.
But the Clarets’ winger has not been ruled out of the World Cup in Russia.
Gudmundsson helped Iceland make an excellent start to their first World Cup Finals campaign with a 1-1 draw with Argentina in their Group D opener in Moscow last Saturday.
Johann Berg Gudmundsson won his 68th cap against Argentina
The 27-year-old was forced to come off after just over an hour and is being monitored by the Iceland medical staff with his country's next group game to come against Nigeria, who lost their opening match to Croatia, in Volgograd on Friday.
“Johann Berg Gudmundsson has torn a muscle. It remains a question whether he will be fit but we’ll see on match-day,” Iceland's assistant coach Helgi Koldvidsson told a news conference today (Wednesday).
Iceland play their final group game against Croatia next Tuesday and, depending on the severity of the tear and Iceland's progress in the compeition, Gudmundsson will be hoping he still has a part to play at Russia 2018.