Queens Park Rangers are looking to trim their wage bill, as they plan for another season in the Championship.
The former Sunderland boss, who took charge of the Greek champions in October, is also said to be interested in a move for fellow Villa misfit Charles N'Zogbia.
Liverpool take a narrow 1-0 lead to Anfield following the first leg of their League Cup semi-final with Stoke City at the Britannia Stadium.
Wolverhampton Wanderers are said to be keen to offer Everton midfielder Steven Pienaar a chance to play regular football again.
Newcastle United have reportedly made a £19 million offer to Lyon for Alexandre Lacazette.
Leeds United, Queens Park Rangers and Derby County all reportedly want Aston Villa's Jack Grealish on loan.
The Dutchman has nine goals in 16 games for the Eredivisie side.
Haller has been excellent for the Eredivisie side since joining midway through last season.
West Ham United are not set to be active in the January transfer window.
The Norwegian wonderkid is on trial at Celtic.