The Dane's season is over due to a serious knee injury.
Vlaar told the club's website: "It was really bad news for Jores. He now has an ACL injury. He was doing really good.
"Hopefully some good results for us will make him feel better.
"It will get his spirits up for his comeback ahead. He will come back strong, I'm sure.
"We all want to help him with that."
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