Sigurdsson, who joined Everton in 2017 for a club record of 45 million pounds ($62.5 million), was hit in the knee during an EPL game against Brighton & Hove Albion but was able to complete the game, reports Efe.
"Gylfi Sigurdsson will see a specialist this evening to determine a timeframe for recovery from the knee injury he sustained in Saturday's Premier League win over Brighton at Goodison," Everton said in a statement.
"It is anticipated that the 28-year-old Icelandic international could be sidelined for several weeks, but it will only be after consulting with the specialist that a definitive timeframe will be known," the club added.
In the worst possible scenario, Sigurdsson could miss the rest of the season as well as the World Cup, which is to take place from June 14 to July 15.
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