Portsmouth boss John Mousinho said that he felt Connor Ogilvie's red card against Oxford United was not "clear cut" but admitted the defender did not need to make the challenge.
Ogilvie was dismissed after 17 minutes for a lunging tackle on Stan Mills, his sending off then triggered a furious reaction from the home support.
Portsmouth took an early lead before Oxford managed to work their way back into the game but the hosts scored late to rescue a point thanks to Andre Dozzell’s goal.
"In real time I don't think anyone in the stadium was expecting it to be a red card including Oxford," Mousinho told BBC Radio Solent.
"In these games when stakes are so high, if you are going to do something as monumental as that I think you have to be one hundred percent sure and I don't think it's clear cut.
"I'm not going to hide away from the fact that I don't think Connor needs to make the challenge but if that's a red card then there should be a fair few more.
"It's still extremely tight down the bottom, we wanted to win the game today and I'm not sure the draw helped either side too much.
"In the circumstances we'll obviously take it, going deep into the game and then getting the equaliser."
Portsmouth are next in Championship action on Saturday when they travel away to Middlesbrough.
