A statement from the Finnish international’s lawyer on Friday night detailed the slur he alleges was heard during Rangers’ Europa League defeat to Slavia Prague and which the Czech club continues to deny.
Kamara’s Rangers team-mate Kemar Roofe was also subjected to vile abuse online.
Neither Rangers nor Celtic players conducted the anti-racism gesture of taking the knee ahead of kick-off, and Celtic captain Scott Brown personally sought out Kamara during the pre-match warm-up to show his support for his fellow player.
On Saturday Dundee United and Motherwell did not kneel, and instead released statements saying they stood with the Rangers players and were standing up to racism.
Midfielder Kamara was selected for the Old Firm match, and manager Steven Gerrard said: “He's doing fine and looking forward to the game." Kemar Roofe was named as substitute.