New Aberdeen chairman Dave Cormack's "attack" on defender Kristoffer Ajer is "disgraceful" and "embarrassing", says Celtic manager Neil Lennon.
Manager Derek McInnes claimed Ajer had "laughed and winked" at Cosgrove, and an irate Lennon says the Scottish FA should look at Cormack's comments.
"I'm not having that at all," he said.
Speaking on BBC Radio Scotland, he added: "Kris is the victim in all of this. He was on the end of a heavy challenge and I'm not having someone from the Aberdeen board talking about my players like that.
"We've tried to be balanced but when you see comments like that we're not tolerating it as a club. It's very naive from Mr Cormack. It's an attack on my player and the comments are absolutely disgraceful."
Asked after Celtic's 2-1 win at St Mirren if he thinks the Scottish FA should consider Cormack's comments, Lennon said: "Yes, I do."
Posting on Twitter, US-based software entrepreneur Cormack had written: "Law = fairness & consistency.
"Sam will take his ban, but the compliance officer has a duty to review Ajer feigning injury with his triple salvo and miraculous recovery after Sam gets the red."
Cormack compared it to another incident involving Celtic striker Leigh Griffiths and Aberdeen midfielder Lewis Ferguson.
"Griffiths lunges into Ferguson's knee with both feet in the air. Fairness for ALL please!" he stated.
Cosgrove, who has scored 20 goals this season, began his two-match ban as Aberdeen defeat Livingston 2-1 at Pittodrie on Thursday.
'Sunday's derby won't define title race'
Celtic's victory in Paisley kept the Scottish Premiership leaders five points clear of Rangers before Sunday's Old Firm derby at Parkhead, with Lennon singling out Odsonne Edouard for praise.
The French striker assisted goals for Callum McGregor and James Forrest as the champions made it 11 league wins in succession. And Lennon confirmed the 21-year-old will start on Sunday, having only been fit enough for the bench in last month's League Cup final win over Rangers.
"He's an outstanding centre-forward who makes us better," Lennon said. "He's a threat and I like his physicality. I like his pace - he comes to life in the final third and he's such a clever player. At times he was sublime and deserved a goal.
"It's not the emphatic scoreline it should have been but we had good control, created a lot of chances and our play at times on the counter-attack was spectacular.
"The league won't be defined by what happens on Sunday, but we want to put on another good performance like we have done over the last few weeks."