The 32-year-old has struggled for game-time for the Scottish Premiership side this season.
Tottenham appear to be the front-runners in the pursuit of the player.
Here is how we predict Sunderland and Arsenal will line up this weekend:
Allen has enjoyed some of his best form in the second half of the season.
Middlesbrough will face Ipswich Town in the Championship this weekend, while Huddersfield Town will take on Birmingham City.
The 21-year-old had been on loan at Walsall.
Leeds United are winning regularly and impressing with their overall play.
Rangers are reportedly keen to land Southend United goalkeeper Daniel Bentley.
Celtic are reportedly interested in signing Tino-Sven Susic from Hajduk Split in the summer transfer window.
Talk is rife about who could potentially replace Arsene Wenger should he leave the club.
West Ham United may be the talk of the Premier League at the moment but it is the cup competitions that present their best chance of a long-awaited trophy.
Aston Villa’s Rudy Gestede has struggled since his summer mover from Blackburn.
Charlie Austin was linked with a move away from Queens Park Rangers in the summer transfer window.