The FA will begin an investigation today into two pitch invasions at the end of Villa’s 2-0 victory over West Brom.
Seats were thrown from the Albion fans and a pitch invasion delayed the game before Villa fans ran onto the surface again at the final whistle.
Both teams were surrounded by fans and midfielder Delph, who scored his first goal for a year to give Villa the lead, admitted it was unnerving.
“Very, very scary,” he said. “My armband got nicked, someone got my left boot, but I could appreciate the relief the fans are feeling after a result like that.
“It was dangerous. Someone tried to take my boot off. People tried to kiss me and were biting me. It was scary.”
Albion boss Tony Pulis insisted Villa should have recognised the potential problems ahead of the game.
He said: “I actually think Villa should look at the stewarding. It’s a quarter-final of the FA Cup, a full house, you know it’s going to be tasty. The hierarchy at Villa should recognise the need for stewards both ends of the pitch.
“It puts the players at danger and we don’t want to see that.”
On the pitch, Scott Sinclair wrapped up Villa’s win with a second goal after Claudio Yacob had been sent off for the Baggies after a challenge with Leandro Bacuna.
Villa’s Jack Grealish was also dismissed in injury time after collecting a second yellow card for diving.
Pulis said: “That’s (Yacob) not a sending off.
“Yac has had three touches before he blows up. I thought the linesman had said something but I have spoken to Anthony (Taylor, referee) and he has made the decision.
“I don’t know what Grealish got sent off for, I was amazed when he showed him the red card.”
ASTON VILLA: Given, Bacuna, Okore, Clark, Lowton, Cleverley (Sanchez 65), Westwood, Delph, N’Zogbia (Grealish 74), Agbonlahor (Gil 89), Sinclair.
WEST BROM: Myhill, Dawson, McAuley, Olsson (McManaman 68), Lescott, Gardner (Mulumbu 85), Yacob, Morrison, Brunt, Ideye, Berahino.
Referee: Anthony Taylor.