Assistant coach Rob Howley has warned the British and Irish Lions against looking too far ahead.
The Lions can seal a first series win in 16 years if they can topple Australia at the Etihad Stadium on Saturday, having won the opening Test 23-21.
However Howley claims it is vital that the squad remain focused on the task at hand.
"If you dare to dream, it turns into a nightmare," said Howley.
"I think the players are very focused. They have been very task orientated this week and got on with their jobs - and that is what you have to do with a Test match of this nature.
"Tomorrow evening you have to focus on your job every 30 seconds because if you dare to think about what you are going to create or what's possibly in the future then that doesn't happen.
"It is making sure you do your job, are accountable and international rugby is about keeping your discipline.
"This group of players on and off the field over the last six weeks have been absolutely fantastic in their discipline."
Howley is not the only person to speak to the squad about the importance of Saturday's match, with centre Brian O'Driscoll having relived his previous tour experiences.
O'Driscoll was part of the losing tours to Australia in 2001, New Zealand in 2005 and South Africa in 2009.
And Howley added: "Brian O'Driscoll has been hugely influential, I think his experience of 2001 - you learn from those experiences and we spoke of those experiences yesterday.
"There's probably one player that deserves it more than anyone else and that is Brian O'Driscoll. He's been fantastic for northern hemisphere rugby, world rugby, but it just shows how hard it is to win a (Lions) Test series.
"I think there's an attitude to go 2-0, that's what we've been talking about in the week. That's what Brian O'Driscoll said, you have to take that opportunity. We're 1-0 up and we could put Australia to bed tomorrow night, that's our mindset.
"If you dare to dream it turns into a nightmare because if you to think about what you're going to create or what possibly is in the future, that doesn't happen."