According to Spanish newspaper AS, Celtic have contacted the agent of Athletic Bilbao striker Borja Viguera over joining the club this month.
The Bhoys have had an underwhelming season so far, having crashed out of both the Champions League and the Europa League, whilst they have also served up some poor performances in the league, giving Aberdeen hope of a shock title win this season.
That has all piled the pressure on manager Ronny Deila, with fans critical of the brand of football on display at Celtic Park, whilst many supporters want to see him play with two up front - but the Norwegian has been tied to a 4-2-3-1 system ever since arriving from Stromsgodset in 2014.
Despite having options like Carlton Cole and Nadir Ciftci in his ranks, Deila often plays Leigh Griffiths up front on his own; yet it's still believed that he wants another striker to boost his attacking ranks.
Now, Spanish newspaper AS report that Celtic have been in contact with the agent of Athletic Bilbao forward Borja Viguera over a surprise January deal.
The 28-year-old scored just three goals in 28 games last season, whilst he has only played four times this term, failing to challenge the likes of Aritz Aduriz and Inaki Williams in the Athletic attack.
It's suggested by AS that Sporting Gijon are interested in taking Viguera on loan for the rest of the season, but Celtic have been in contact with his agent over a possible move to Glasgow.
Given his modest goalscoring record and lack of football this season, an ageing striker like Viguera may not be what Celtic fans had in mind for the January transfer window - and may have to pray that Deila has other options up his sleeve.