Chelsea have confirmed that Marco van Ginkel will be out of action for at least eight months after undergoing knee surgery.
The 25-year-old has spent much of the past three seasons on loan at PSV Eindhoven, helping them win the Eredivisie title in 2015-16 and 2017-18.
Chelsea wrote on their official website that Van Ginkel has had an operation to reconstruct his anterior cruciate ligament and treat damage in his knee.
The Blues also revealed that the Netherlands international, who has been linked with a move to Fenerbahce this summer, is expected to be sidelined until next year.
Van Ginkel has made just four appearances for Chelsea since joining for £8m in 2013.