Birmingham have a launched a £4million bid for Crystal Palace winger Bakary Sako.
New Blues boss Gianfranco Zola, who replaced Gary Rowett last month, has endured a difficult start to his reign and is ready to reshape the squad.
The Italian - appointed by new owners Trillion Trophy Asia - has been told he can spend up to £10million in January.
He has already used £1million to turn Lukas Jutkiewicz's loan from Burnley into a permanent switch - and is now targeting Sako.
The Mali international has played just four times for the Eagles this season and has not started in the Premier League.