Ben Flower said Wigan always knew their game against Hull KR was going to be tough after they progressed in the Challenge Cup.
Missing a number of players through injury, Rovers lost Robbie Mulhern with another injury during the game and Danny Tickle to a red card after punching John Bateman on the stroke of half-time.
The game was all square at 10-10 before 18 unanswered points from Wigan in the final 20 minutes saw them home.
Speaking after the game, Flower said: “We struggled in the first ten minutes of the second half, fair play to them, they stuck at it.
“We just knew we had to stay in the grind. We did that in the end and we came away with the win.
“It’s a great atmosphere here and a great place to come and play but on the back of it it’s a tough place too.
Flower said the Warriors were frustrated with how the game played out but praised the team’s fitness.
“The game didn’t flow and was stop-start but credit to the boys, we hung in there.
“We pride ourselves on being fitter than any other team and maybe that was a factor. They made it tough for us though, right until the end.”
The Wigan prop missed much of the 2017 campaign and says he is determined for the Cherry and Whites to get back to Wembley again and go one better.
“Last year was tough to take, I didn’t play in it due to my injury but it was heart breaking to see all of the boys put so much effort in to come up short in the final.
“We’ve not won the Challenge Cup for a few years now and we’re aware of that so we’ve just got to make sure we keep going out there and performing in these games and getting the wins.”