Black lands Grainger
By Simon Fudge
Last Updated: 01/01/70 1:00am
The 31-year-old will be available for Saturday's home match against Division One leaders Norwich City.
The former Colchester United and Brentford player has been hampered recently by knee problems which have reduced the number of appearances he has been able to make for Steve Bruce's side to just 10 in the last 18 months.
The left back has recovered from his knee injury and he will look to use his time at Highfield Road to boost his match fitness.
Meanwhile, Coventry City striker Gary McSheffrey is reportedly being monitored by Premiership side Middlesbrough.
Reports on Teesside suggest The Riverside club are keeping a close eye on the 21-year-old, who has been in fine form recently for The Sky Blues.
It has been quite a turnaround for McSheffrey this season after he took a successful loan spell at Luton Town earlier in the campaign before returning to Highfield Road.