"Obviously (Nic) hasn't started the way he would have liked. I was really proud of him in the second innings in Brisbane to come out and do the thing for the team and try and score quick runs and have a crack.
"That's what we want from our team, to have unselfish players like that and I thought he did a good job to come out and do that."
With plenty of grass on the MCG wicket, Smith may be tempted to send his bowlers in first should he win the toss.
"It's a lot greener than I've seen it in the past couple of years," he said.
"The grass dies pretty quickly here and and the wicket goes white so we'll sum it up the morning and see what we want to do from there.
"I think the red ball out here is going to be a lot different to the pink ball. It will probably stay harder for a lot longer, so we'll be able to generate that bounce and carry that we couldn't do for long periods of time (in Brisbane)."
The decision to field an unchanged line-up in Melbourne signals a desire for continuity after a period of turmoil during Australia's 2-1 series loss to South Africa.
And with a tour of India on the horizon, Smith is confident Australia are back on track.
The captain was exemplary with the bat in Brisbane but faced criticism for his defensive field settings on day five and for electing not to enforce the follow-on when the hosts claimed a first-innings lead of 287 runs.
"People are open to criticise me all they like but in the end, we won the Test match so I'm happy with that," he said.
"You can always learn from different things. I'm really happy we won the Test match and that's five wins in a row for Australia (including one-day victories), so we're heading in the right direction."
- AAP