Rapid Vienna winger Nicolas Kuhn is "undergoing a medical in London ahead of his move to Celtic".
This is according to Sky Sports who claim that the 24-year-old is "due to fly to Glasgow later this afternoon to finalise the deal".
Barring any last-minute hitches, Kuhn will become the club's first piece of transfer business this January.
It's believed the deal is worth a little under £3m and it is anticipated that the forward will sign a four-year contract at Parkhead.
The one-time Ajax and Bayern Munich player has three goals and seven assists to his name so far this campaign.
Meanwhile, Celtic are set to send youngster Adam Montgomery out on loan for the second time this season.
The Daily Record reports that Motherwell is leading the chase to sign the 21-year-old until the end of the season.
The Steelmen are looking to fend off interest from other Premiership rivals, as well as English lower-league clubs, to land the left-back.
The top-flight strugglers are desperate to sign a left-back this month after Brodie Spencer, who spent the first half of the season on loan at Fir Park, was recalled by parent club Huddersfield.
Montgomery was last week recalled by Celtic after an unsuccessful stint at Fleetwood Town.
The youngster managed just six appearances for the League One outfit. He joined under Scott Brown in the summer, however, he was sacked in early September and the club has changed manager twice since.
It's said that Brendan Rodgers wants to keep a closer eye on Montgomery, so Motherwell seems to be his likely destination.
Montgomery has previous first-team experience in the SPFL at Aberdeen and St Johnstone. His season-long loan at McDiarmid Park last term was certainly regarded as a success as he helped the Perth side stay in the division.
