Johan Mjallby admits Celtic will need to discover a clinical edge ahead of next week's Champions League tie against HJK Helsinki.
Celtic goalkeeper Lukasz Zaluska has signed a new three-year deal at the club.
Celtic boss Neil Lennon has taken former PSV midfielder Rabiu Ibrahim on trial and is also hoping to finalise a new deal for Lukasz Zaluska.
Celtic manager Neil Lennon has confirmed goalkeeper Lukasz Zaluska has been offered a new contract to stay at Parkhead.
Neil Lennon claims his search for a new goalkeeper does not mean that Lukasz Zaluska is destined to lose his starting role.
Johan Mjallby insists Celtic are looking for a goalkeeper to compete with Lukasz Zaluska, rather than replace him.
Neil Lennon has confirmed he is looking at Stipe Pletikosa, although Craig Gordon remains on the club's radar.
Celtic's keeper Lukasz Zaluska is targeting first-team football after playing second fiddle during his time at Parkhead.
Lukasz Zaluska is keen to hold talks with the Celtic management in order to decide his future.
Polonia Warsaw are set to launch a bid to bring Celtic goalkeeper Lukasz Zaluska back home to Poland.
Neil Lennon believes David James' decision not to uproot his family meant he could not join Celtic.
Celtic new-boy Lukasz Zaluska is hoping Dundee United boss Craig Levein follows him to Parkhead.
Lukasz Zaluska insists he would welcome the opportunity to compete with Artur Boruc for Celtic's No.1 jersey.
Dundee Utd manager Craig Levein insists he has not approached Kilmarnock regarding Alan Combe.
Celtic have confirmed Dundee Utd keeper Lukasz Zaluska will move to Parkhead at the end of the season.
Gordon Strachan has confirmed that Celtic have made contact with Dundee United's Lukasz Zaluska.
Dundee United goalkeeper Lukasz Zaluska has admitted he could join Celtic after rejecting a new deal at Tannadice.
Dundee United have announced goalkeeper Lukasz Zaluska is set to leave the club after rejecting a new deal.
Celtic have refused to confirm reports they are looking at Dundee Utd's Lukasz Zalusk.
Poland boss Leo Beenhakker has refused to close the door on Artur Boruc's international career.