Portsmouth boss Harry Redknapp gave his sympathy to Ipswich's Liam Trotter after the youngster was sent off in Pompey's 1-0 FA Cup victory at Portman Road.
Midfielder Trotter, 19, was shown a straight red card in the 24th minute following a late sliding challenge on Pedro Mendes.
After a long deliberation, referee Halsey deemed the one-footed tackle dangerous enough to warrant a straight red card much to the disbelief of the Ipswich team and fans.
Redknapp, whose side claimed their place in the fourth round courtesy of a 51st minute goal from striker David Nugent, said: "It looked a bit harsh. I thought he was going to give the lad a yellow card, and I was surprised to see him pull out the red.
"He is only a young boy and was only a bit late I suppose, but I have not really seen it from where I was."
Pompey continued their fine form away from Fratton Park, but it was no easy feat for the Premier League team against a 10-man Championship side.
"They are a good side and played some terrific football and in the last 10 minutes, they put us under some pressure when Jamo made some great saves," Redknapp continued.
"But with some of the sides which have gone out today, that shows how difficult the FA Cup can be."
ImpressNugent has been only a bit-part player since his £6million summer move from Preston.
But with several players now set to depart for the African Nations Cup, Redknapp believes it is now time for Nugent to make his mark.
"This will do his confidence some good. It is up to him now," he said.
"It has been difficult for him to get into the team, but he will get some games now and we can see what he can do.
"Hopefully he can prove a success."