Powell, 31, joined the Warriors from Sale Sharks at the end of the rugby union season in May, and was a late call-up in to Shaun Wane’s squad for the game, which ended in a shock 18-4 defeat for the league leaders.
He told the club’s official website: “The result wasn’t great but to get on the pitch and wear that jersey was a big step forward for me. There is obviously a lot to work on but I am glad I have come through it unscathed.
“Training has been going well and Shaun Wane asked me how did I feel and I said I was willing to give it a go and I was ready for it, he gave me my chance and I thank Waney for that.
“I knew it was going to be tough beforehand from watching it as a kid. I am one of those guys that will give it my best shot and I will definitely get better.
“My goals are to train just as much as I can and a few more games with spells like that it will start to come.”