Maxwell hit 96 runs to guide his side to an unassailable 3-0 lead after the visitors set them a target of 296. He had walked in when Australia were six-down at one stage, but along with James Faulkner held his nerve until the end.
"I was pretty calm at that stage. When Faulkner came out I was hoping he'd score a bit more and I'd be able to sit at the other end and run with him," said Maxwell after the three-wicket victory.
When asked if he was looking ahead to the World T20, on account of his IPL experience, and the Australian batting's superiority, he replied, "You have to concentrate on the series you're in. It'd be naive of us to look too far ahead. We do talk about it off the field and say that we're looking forward to going over there and getting ready but you're not mentally preparing for it already."
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With one run needed for the win, he was on 96 not out and had to go for a big stroke with the fielders coming in. Maxwell instead holed out.
"I just wanted to hit it. Didn't care where it went, I just wanted to hit it over the infield if it went for one, two, eight, four. I was just trying to hit it," he said.
(REOPENS FGN 37)
After wins in Perth, Brisbane and Melbourne, Australia have now won this five-match series, with ODIs in Canberra and Sydney yet to go. There will be a T20I series post this contest.
"It's an easier group to come into than when I first came into the squad when there was Mike Hussey, Michael Clarke, Mitchell Johnson and guys you've been watching on TV and it's so daunting. I think we have such a fresh group that it's probably easier for the guys to come in and it makes it a bit easier," he said.
"I thought they played really well today. Everything clicked for them. On a difficult wicket they probably got away from us in the last few overs. We look at the score with 10 overs left and they were 201 and they got to 295. They got away from us a little bit, which could have happened in the first two games but we bowled really well in those games.
In reply, India looked to sail through the day intact, but KL Rahul was done in by a rising Pat Cummins delivery. Maxwell said the pacer will be key to their success tomorrow.
"I avoid him in the nets, along with (Mitchell) Starc, I try not to face them. I'm not surprised he was able to get that out there. He's awkward. He's got a high release and able to hit a length where he reacts differently.
"If you look at the way the Indians bowled to us yesterday I don't think he hit the right length for reverse swing. They're either a little bit short or full when they dug it in. They got a bit more right today when they pulled their length back and tried to hit the top of the stumps.