Boss Mick McCarthy felt his side deserved to beat Millwall after a tough battle to record their first three points of the season in their first home game of the season.
McCarthy said: "It was a tough battle and we deserved the win. That’s Championship football. You have to fight your corner and take your chances when they come along.
"I think there’s some suggestion from them that [Cressy] fouled [Jack Smith] on the first goal but I don’t think he fouled him at all.
"I think he just got in and there was maybe a bit of good fortune that it was an own goal. But if you put a ball in there, defenders have got to deal with it and they didn’t.
"The second one is a magnificent header and I haven’t got a clue what happened with the third, so if someone wants to enlighten me I’d be delighted.
"We had chances in the first half as well. I think we edged it, I don’t think there’ll be any doubt about that."
The Blues boss was particularly pleased with Tommy Smith’s goal, which had him reminiscing about his own career as a centre-half: "Fabulous header, wasn’t it? Lovely to see that. Good delivery.
"Like one of my 12 out of 500-odd league games. That wasn’t bad, was it? They were generally like that, I can remember most of them as well. I haven’t been that high off the ground for a long time, I can tell you.”
Asked what pleased him most about the performance, he said: "The way that we stuck to it because it was a hard game.
"They had a really good chance before we scored, they had one flash across the goalmouth, Chaplow I think it was got his head on it.
"What we didn’t do was crumble, we stuck with it and we got our goal, which was nice because sometimes you can do well in the first half and then they have a couple of chances and you suddenly find yourself one down.
"You might get a bit of good fortune, but you have to be strong in the league. If you give one away, suddenly it’s a really difficult task, a bit like at Stevenage the other night - the game was going nowhere, we gave a penalty away and it changed the course of it.”
On the FA’s Sir Bobby Robson National Football Day, McCarthy admitted that the legendary Blues boss might have wanted a little more style to go with the 3-0 victory: "I think Sir Bobby might like a bit more silky football, to be quite honest. But I still think he would have taken a 3-0 win, no matter how it comes.
"As a manager you can’t always win playing wonderfully free-flowing football, you take it as it comes. I think he would have been happy enough with that.”
McCarthy conceded that 3-0 flattered his side a touch but Millwall manager Steve Lomas wasn’t arguing with the scoreline: "It was 3-0 whatever way you say.
"From our point of view it was pretty even in the first half, I didn’t think there was much in the game.
"We knew that Ipswich were going to come out of the traps, it was Sir Bobby Robson Day and they’d had two defeats.
"Our target was to get to at least half-time with a clean sheet, which we did. We asked them for more in the second half and to be fair to them they started on the front foot.
"We had a couple of chances, Chaps had a chance at the near post, maybe James Henry had a shout for a penalty when he was quite clearly pulled back, I don’t know whether it was inside or outside the box, but nothing was given.”
He added: "We gifted them a goal start really and it’s tough enough to go away from home when you’re at full pelt but when you gift them such silly goals, it’s tough."
Lomas didn't think Cresswell fouled Smith in run-up to the first goal: "I don’t think so. Jack’s a great lad and I thought he played very well today, but I think he probably should have kicked it out for a corner, and he knows that, he doesn’t need me to tell him that.
"The only thing I’m really disappointed about is that when you’re 1-0 down you try and keep it that way until the end of the game and hopefully get a chance, and we didn’t do that.”