Manchester United have been handed another injury scare after Daley Blind limped out of Holland training.
The defender was training ahead of his country's friendly with England at Wembley on Tuesday.
However, the problem is not thought to be a serious one and Blind is still in line to captain Holland against Roy Hodgson's men, reports the Manchester Evening News.
But Louis van Gaal will be sweating on his fitness ahead of United facing Everton at Old Trafford on Sunday.
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Blind, 26, has been a regular in the Reds' defence this season and Van Gaal will be desperate to avoid another injury during the international break after losing Bastian Schweinsteiger last week.
Schweinsteiger sustained a knee injury in training for Germany and was pictured wearing a knee brace at the weekend. He could be out for the rest of the season.
Following the latest United injury scare, Blind told De Telegraaf: "My hamstring is stiff.
"I didn't want to take any risks in view of the upcoming games.
"We have to see how it goes. But I don't think it's that bad."
Blind has started every United game since October 28 and has not suffered an injury on club duty this campaign.