Birmingham admit there is still plenty of work to be done before striker Obafemi Martins completes his possible loan move from Rubin Kazan.
The former Newcastle player is due to fly into Birmingham to start negotiations with the Carling Cup finalists.
But sources close to Blues indicate there will be no concrete announcements on Sunday regarding 26-year-old Martins.
Martins is still to undergo a medical and to negotiate terms while Birmingham also have to obtain a work permit for the Nigeria international.
Blues boss Alex McLeish is desperate to bring in a new forward before the transfer window closes. He failed in his attempts to sign Robbie Keane and Kenny Miller.
Martins moved from Inter Milan to Newcastle in 2006 and scored 39 goals in 105 appearances for the Magpies. He was sold to Wolfsburg for £9million in the summer of 2009 but after 12 months moved to Rubin Kazan.