Adrian Lam's mixed emotions after Wigan Warriors' Challenge Cup win

He was pleased to nil their opponents, emerge unscathed and progress to the quarter-finals.

But he admitted there was a sense of frustration over the number of penalties which blighted their display and interrupted the flow of the contest.

"I was frustrated at times, I think we had ourselves to blame," he said.

"The penalties were out of control, it's something we're not used to.

"I didn't know what some of the penalties were for at some stage, it's something we'll bring up in the week and address it and move on."

He added: "It was our own discipline without a doubt, I'm not blaming the referee (Marcus Griffiths) at all, it was one of those games... the sooner we got through it the better.

"We got through injury-free, we're in the quarter-finals and we held opponents to nil, which was another highlight. And it was pleasing to give chances to a couple of players who haven't played this year, too."

Both of those - veteran prop Tony Clubb and teenager Sam Halsall - scored tries while winger Umyla Hanley also registered his first touchdown for the club.

Wigan had to wait until the 20th minute to break the deadlock through a fine try from the impressive Zak Hardaker who finished the game with three goals.

Harry Smith and Halsall touched down to make it 14-0 before the break, with Hanley and recalled Clubb later crossing.

"I thought Zak was outstanding, he's been brilliant in all three games," continued Lam.

"Jackson Hastings stepped up and as the season unfolds he'll run the ball a bit more.

"Credit to York, they were courageous and never gave in, they had plenty of effort and certainly their coach should be happy."

The quarter-final draw will be made during the half-time break of Catalans-Wakefield tomorrow (Saturday).