McLeish has enjoyed a two-week break since Blues' last fixture, but with players now returning from international duty and indeed the treatment room, he admits it is time to focus on Monday's showdown.
"We've had a couple of hard-working sessions after the lads had a couple of days off since the last game," he told the Birmingham Mail. "We're concentrating on the sharpness aspect now leading up to Monday night.
"We've got a few coming back from injury as well, so the preparations are going well."
Returning strikers Garry O'Connor and Kevin Phillips have been upping their fitness levels in readiness for Monday's encounter, although the game may just come too soon for James McFadden and Marcus Bent as they battle to be in the frame for inclusion.