Dutch midfielder Frenkie de Jong has sparked concern at Barcelona after suffering a severe knee injury that could keep him off the pitch for an extended period.

According to Spanish newspaper Marca, the start of the preseason for the new season has not been ideal for Barcelona, as several first-team players underwent routine medical tests on Monday before the start of preparations.

Not all players attended, as those who participated in the World Cup were given extra days of rest. Nevertheless, both Ronald Araujo and Frenkie de Jong were present at Barcelona's facilities, but the latter brought bad news.

The Dutch international is suffering from a serious knee injury, according to what the newspaper has learned, although a final diagnosis has not yet been reached. The midfielder will undergo further tests in the coming days.

Despite this, the level of concern at Barcelona has reached its highest point, with fears of the worst-case scenario growing, and the possibility of him being sidelined for several months not ruled out. Estimates suggest he could be out for up to 4 months.

There is still no official statement from Barcelona regarding the injury, as the official medical report is awaited after confirming the final diagnosis, which will not happen until the player completes all necessary tests. However, current indicators are not reassuring.

De Jong has suffered a series of injuries in recent years. Last season, he was absent for nearly two months due to a muscle injury in his thigh, which came at a crucial stage of the season between late February and early April.

Before that, he suffered an ankle injury that forced him to stop playing on two occasions, keeping him off the pitch for a total of 6 months, during which he missed 31 matches.