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"It is always nice to get your first home league win and it has lifted us off the bottom as well, but it is just the start," he told the club's official website.
"We now have to press home and get out of the bottom three - and we don't want to waste the work of Wednesday, which has been a long time coming."
Winterburn is also hoping that Liverpool's recent good form deserts them on Sunday.
"It is going to be difficult because they are a good team but if we show the same commitment we can get something from the game.
"Perhaps we can get a lucky break - we need another win, really, and though we will give them the respect they deserve but if we put them under pressure you have always got a chance.
"They do have a fantastic side but have had a blip recently and are coming through it. We will have to show the same desire and commitment we did on Wednesday."