Manchester United manager Louis van Gaal has refused to rule out making a bid for Roma midfielder Kevin Strootman.
Juventus are confident Arturo Vidal will not be lured away by Manchester United in the summer transfer window.
Rob Hall has extended his loan stay with Birmingham by a further month.
The West Ham winger will now remain at St Andrew's until at least Saturday February 16, although his parent club do have the option of a recall clause.
Hall joined Blues in November and has been an instant hit with both manager Lee Clark and the club's fans.
The England Under-19 international has made a total of eight appearances to date.