Grella has been suffering with a groin problem with Rovers also having concerns over David Dunn (hamstring).

It has been a frustrating campaign so far for Grella although he has recently started to put a run of appearances together for Rovers.

Manager Sam Allardyce is likely to make big changes from the side which lost the FA Cup fifth round replay against Coventry in midweek.

Both teams desperately need the points this weekend to boost chances of avoiding the drop.