"We will go and try to win a game of football. The last four results haven't been good enough, no way," Lambert told the club's official website.
"Everyone thought after the Chelsea win that we would drive on - but it's not happened. Now, you have to win a game of football. I know it's an old cliché. The game is all about players, always will be - and the supporters who come and watch it. We have to go and win a match.
"The lads have been excellent this week. They have been great. They really have. I am sure they will be ready for this one. Getting that win - that's all I am focused on. The lads are too. You get a win and it looks rosier. It's up to us to go and do it."
Villa's match against Southampton takes place at 3pm on Saturday afternoon.