One-time German international Marvin Compper could leave the Bundesliga for Celtic in the New Year.
Celtic are linked with signing the young duo in January.
Mark Warburton left Ibrox this year but says Glasgow Rangers will continue to struggle to compete with Celtic.
Celtic were linked with Hibernian midfielder John McGinn in the summer transfer window.
Celtic and Hibernian drew 2-2 this weekend and a former Bhoys player came back to haunt them.
Brendan Rodgers’s Celtic drew with Hibernian at Easter Road in the Scottish Premiership on Sunday.
Kieran Tierney is getting abuse from Celtic fans on Twitter
Celtic striker Leigh Griffiths faced Manchester City-owned West Ham United goalkeeper Joe Hart in June.
This afternoon, Celtic's Scott Brown comes up against the man widely touted to replace him at Parkhead.
James Forrest only had a few months left on his Celtic contract when Rodgers was appointed in the summer of 2016.
Ryan Jack is just a few months into his Rangers career but has already been sent off four times. But could his brutal reputation be a good thing?
Celtic have one of the most underrated wingers on their books and he is currently outperforming the Bhoys loanee.
Celtic were thrashed by Paris Saint-Germain in the French capital on Wednesday night's Champions League match. What did we learn?