Declan Bonner did not witness Tiernan McCann's tackle on the Donegal corner-back Stephen McMenamin, which Joe Brolly described as a disgrace.
The Tyrone man appeared to reach into McMenamin's mouth and also stood on the Donegal defender's head in an incident that went unpunished by referee David Gough at the time.
"I actually didn't see it. We will look at the whole game later this evening," said Bonner, who was pleased with his own team's discipline against a side they have faced in some bad-tempered matches over the recent past.
"A player of Peter Harte's calibre, he is one of their key players and it is a big loss for Tyrone," said Bonner of the black-carded Tyrone full-forward.
"I thought we were very disciplined today and our discipline was good and in the white heat of championship battle against Tyrone.
Man of the match Michael Murphy also referenced the recent past when expressing his satisfaction with the 1-16 to 0-15 Ulster SFC semi-final win.
"We were on the back of a good few beating by Tyrone over the last few years. We wanted to be competitive because not only did we get beat in those games we got beaten fairly comprehensively. There was a bit of pride to restore," said Murphy.
RTÉ pundits Colm O'Rourke and Brolly however were damning of McCann's behaviour, suggesting he would be deserving of a lengthy ban.
"I think it was a disgrace what he did," said Brolly. "He was bleeding afterwards. There is no place for that in the game and it is disgrace.
"Proper action needs to be taken."
Colm O'Rourke added: "He should not have done that, it was a lack of manliness."