Defender Winston Reid has signed a new long-term contract with West Ham which commits him until the summer of 2021.
Blackburn have signed defender Doneil Henry on a month's loan from West Ham.
Wigan have made highly-rated full-back Tavernier one of their top targets this summer and they are hoping to fend off interest from several clubs to land the player.
Tavernier spent last season on loan at Rotherham and helped the club win promotion to the Championship.
Rotherham were keen to make Tavernier's move permanent, but Wigan are in pole position to land the 22-year-old.
Wigan boss Uwe Rosler is a big fan of the right-back and sees him as a key addition to his plans as he looks to mount another bid for promotion to the Premier League next season.
Tavernier, who has made 10 first-team appearances for Newcastle, is entering the final year of his contract at St James' Park and the club have decided to cash-in on him.