The Walsall-born 25-year-old, who recently penned a new deal with the club, has been first choice goalkeeper for most of the season, making twenty-four first-team appearances, but is being pushed all the way by on-loan Southampton stopper Jack Rose.
Rose, who joined the club on a season-long loan in early July, has gone on to make five first-team appearances and Roberts believes the competition between the pair, alongside the help of their goalkeeping coach Maik Taylor, is helping to bring the best out of them.
Speaking via the Express & Star, Liam said; "You can never rest on your laurels. You’ve got to keep pushing and keep working hard. Not saying that I would, but if you get a little bit too comfy, complacency creeps in.
"So personally you need to keep working hard and push one another, then we’re both flying in training. Maik’s really professional in training day in and day out, working on things that I need to work on all the time.
"He brings a lot of calmness to it as well. He’s got a lot of international experience, a lot of experience in the Premier League and he’s a giant coming for crosses so he’s trying to instil things that he used to work on into me.
"Rose is also working phenomenally well, he came into the team and did well and we’re both pushing each other to get the best that we can for the team. We have a great laugh in training, but we take it seriously so there’s a good balance.
"Rose has come from the Premier League, he’s a good guy and we get on really well. I don’t know what’s going to happen this season, there might be a time where Rosey comes back in so I have to make sure that when I’m in the team, I do the right things day in, day out."