Cook staying calm after Blues stun Derby
Fratton Park erupted when the referee blew the final whistle.
Pompey had upset odds-on favourites Derby to progress to the second round of the Capital One Cup.
A debut goal from Adam McGurk and a strike from teenage substitute Conor Chaplin secured a 2-1 victory against the Championship side.
But while everyone else got swept away in the euphoria, Paul Cook is keeping his feet planted firmly on the ground.
The Blues boss said: “We’re a professional club and just because we’ve worked hard and got a good result, it doesn’t mean everyone should get carried away.
“The lads who came in were excellent, but now we just keep preparing for our game at Plymouth on Saturday.
“We defended well and our shape was good out of possession, so I was very happy with that.
“The lack of chances we allowed Derby to create because of the honesty of our work ethic was pleasing and credit must go to Ben Close and Danny Hollands for that.
“Conor came on and gave us that extra bit of quality, so all in all it was a good night for us.
“He’s going to be a good player for us – in fact, he is already – and we’ve seen that level of finishing from him in pre-season.
“We know that he’ll get goals for us when he’s on the pitch, but we want a strong squad and it’s not about individuals.”
Cook was delighted with the noise generated from the Fratton faithful, especially after Derby defender Jason Shackell had levelled the tie.
He said: “That was probably one of the best atmospheres I’ve ever been involved in – and that’s just for a first round cup tie.
“When Derby scored I’ve never heard a noise like it from our supporters. They’re putting us under pressure to deliver something for them.”