Hull KR coach Tony Smith admitted his side had no match to the speed and accuracy of Wigan's attack in their 52-10 defeat.
The former Warrington coach hailed the Warriors' nine-try display, and echoed Adrian Lam's comments that it was their best performance of the year.
"I can't fault our effort, we weren't at our best - most teams go through dips in energy level," said Smith.
"We just need to make sure it's a dip this week, but jeez it's hard to stop when opponents are going that fast and executing like they were. They had a heap of ball, and they scored a heap of points.
"That was Wigan's best performance of the year, certainly that I've seen - and I've seen a lot.
"When they kick into gear they have an incredible amount of speed - speed to burn, some of those kids on the edges.
"George Williams had a field day, I love watching him - I didn't enjoy watching him tonight. But all credit to them."