The goalkeeper has been outstanding on-loan with Millwall this season.
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ChonicleLive says Millwall are expected to pursue a permanent deal for Patterson, but will face stiff competition.
West Brom and Hull City are also interested in Patterson, while Premier League new-boys Coventry City are also watching deveopments.
For their part, Sunderland rate Patterson in the £8m class ahead of the summer transfer window.
