While he admits that his players looked "jaded" during the first half, Cunningham believes that they ran out deserved winners thanks to a dominant second-half performance.
"We looked a bit jaded in the first half but I was immensely pleased with our second-half show. We set high standards at this club and were virtually untouchable at times," he is quoted as saying by BBC Sport.
"Atelea Vea was absolutely brilliant and is playing well with Joe Greenwood in the second row. Travis Burns has also fitted into our system really well and all the kids are doing a big job which is promising for the club."
St Helens are back in action on Thursday when they host Warrington Wolves in the league.