United's top four tilt appears a long way off after their defeat at Stoke City.
But Dalglish told the Daily Mal: "United have been one of the top-four teams for a long time and although they have not run their race yet it is very difficult for them.
"Manchester United in top form can achieve it but they've not been in top form.
"There are seven or eight teams at the top and they all have an opportunity to get one of the top four spots and Manchester United are one of them."
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