Celtic's Vakoun Issouf Bayo is their only permanent signing so far.
Celtic snapped up American forward Timothy Weah on Monday night.
Morelos scored for Rangers once again on Boxing Day.
Celtic will go into this weekend's Old Firm game at the top of the Scottish Premiership after a dramatic victory.
Steven Gerrard’s Glasgow Rangers will face Brendan Rodgers’s Celtic at Ibrox in the Old Firm derby next weekend.
Steven Gerrard’s Glasgow Rangers will face Brendan Rodgers’s Celtic at Ibrox later this month.
James McFadden spoke about Mikey Johnston's performance for Celtic.
Odsonne Edouard's form for Brendan Rodgers' Celtic side has slowed in recent matches.
Odsonne Edouard is Celtic's most expensive signing.
Brendan Rodgers’s Celtic lost to Hibernian on Sunday.