While Kumar proved expensive in the series decider against New Zealand, Bumrah bowled brilliantly in the death overs to stop the visitors at 331 for seven in response to India's 337 for six.
New Zealand, needing 30 off the last 18 balls with five wickets in hand, were on course for a famous series win before Bumrah dashed their hopes with a match-winning spell last night.
Rohit, who smashed 147 and stitched a record breaking 230-run stand with captain Virat Kohli at Green Park, said India could not have won seven bilateral ODI series in a row without Kumar and Bumrah.
"Even in this match there was so much dew, the ball was wet to be able to defend on that kind of wicket, with two set batsmen. We are talking about two best death bowlers in world currently. On this wicket, in these conditions, 35 required in four overs, it should have been made easily. It's only because of these two that we could pull the game back."
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India outplayed Australia 4-1 but were stretched to the limit by a spirited New Zealand, who eventually failed to win the big moments despite competing hard. Asked to compare the team's performance in the series, Rohit said both the contests were equally tough.
"Firstly there are no easy wins. Yes, even when we played against Australia, they tested us a number of times and we responded well to the situations and won the games," Rohit said.
"Against New Zealand, the first game in Mumbai I thought we did not put enough runs on the board. 280 on a Wankhede wicket was never going to be easy to defend. But again the last two games we played we showed a lot of character, we came back from tough situations. That is the hallmark of this team," he added.
"We knew that it was not going to be that easy because there was a lot of dew on the field. But our bowlers did exceptionally well to come back every now and then. Whenever they are put under pressure, they know how to come back.
"It's not happened once, it has happened many times now. It's a good thing for the team going forward. If you can respond to these situations really well and handle that situation really well, as a team you are only going to grow," he said.
"I started off I started off very cautiously because I understand the threat of Time Southee and Trent Boult with the new ball. And once the shine of the ball was gone, it was about me not making mistakes and getting out.
"I have played here a few times now and I understand the nature of the wicket. So unless you make a mistake, you are not going to get out. And the most important thing about my batting was the partnership. Because once you get stuck in the partnership, it's always difficult (for the bowlers)," said Rohit.
"I did not make any mental change. There will be failures at times. It does not mean you need to change a whole lot. You need to focus on little things. I was trying to do that. Watching my videos, talking to our batting coaches," Rohit said.
"I like to follow my routine, which is to just understand the nature of the wicket and what shots you need to play.
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