The former Baggies striker managed 21 goals for the Latics last season and played a huge part in the promotion.
He has also experienced the Premiership before and knows that the Latics need to strengthen if they are to give themselves a chance.
There has been enough penny pinching, now it's time for the business to happen.
Roberts told Sky Sports: "I'd like to see new players here. I know there's a lot of hard work going on behind the scenes.
"I'm sure it's only a matter of time before new players start arriving."