Despite confessing that he is not "100%" fit, Shea has said that he felt that he could have performed better.
"I'm not 100%, but I'm getting better and I'm almost there," he told reporters.
"I just have to keep playing and get back into it. I don't think I played very well, but it's good to get a taste.
"Every team has their own style and the league here is faster so you just have to get used to it."
Shea joined the Potters last month following a four-year stint with FC Dallas.