Celtic manager Tony Mowbray admits he cannot be certain of making fresh signings in January despite his best efforts in picking out potential recruits.
Robbie Keane, Matthew Kilgallon and Belarus defender Dmitry Verkhovtsov have been linked with the Parkhead club in recent weeks. However Mowbray is unwilling to discuss potential targets and knows there are no guarantees he will be able to bring the players he wants to Celtic, although he has already managed to sign South Korean midfielder Ki Sung Yueng.
The former Hibernian and West Brom boss said: "I don't think it is appropriate to talk about individual players. I'm not sure how those names come around."
He added: "I have never heard of some of them, some we are very aware of and some I know are not possible.
"But I don't think you should discuss individuals.
"What we hope to do in January is to add players to help the squad and to help the existing players and not necessarily replace them.
"We have been working very hard in the last few months to identify footballers and areas of the team which needs strengthening and that continues.
"But there are no guarantees that we will bring in anyone other than Ki."
Meanwhile Mowbray has played down the importance of the forthcoming Old Firm game to Celtic's Clydesdale Bank Premier League title hopes. Celtic are four points behind Rangers, with both sides having two games each before their January 3 meeting at Parkhead.
"For us, the Old Firm game is just another three points to keep our total running," Mowbray said. "It would be nice to go top and we want to be top from start to finish but that's not the case, it tends to change hands."
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