Coventry were prepared to sell Westwood, 26, in the transfer window but received no bids, with clubs reluctant to pay a fee for someone who will be out of contract at the end of the season.
Everton have been watching Westwood for 18 months but Wigan's need may be greater with Ali Al Habsi set to return to Bolton after his season-long loan.
Wanted: Coventry and Republic of Ireland goalkeeper Keiren Westwood
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