"I think in terms of our squad here, probably it didn't allow us the flexibility in some ways to be able to change the combinations a little bit," he said in the post-match press conference. "But I think going forward, we've got to look at certain areas in which we can get better. Finding depth in our batting has been an area we are trying to address. We are trying to do the best we possibly can but that's certainly an area we can look at, how we cannot weaken our bowling attack but ensure we have a certain amount of depth in batting.

"As these games are going on, and scores are becoming bigger and bigger, if you look at West Indies, they had Alzarri Joseph coming in at No. 11 and he can hit a mean ball. So you have sides which have that depth. Obviously, we have some challenges on that front and we need to work on that. It's certainly something that this series has shown us and we need to build on that depth."

Jaiswal, Tilak and Mukesh impress Dravid

The players who did get an opportunity in the West Indies made the most of it. Jaiswal struck a century on Test debut and a match-winning half-century in the T20Is as well. Tilak is already being talked about as an option for bigger challenges, like the Asia Cup. And Mukesh, having toiled for several years in domestic cricket for Bengal, proved he was good enough to win an India cap in all three formats in the space of just a few weeks.

"I thought all the three guys who made debuts for us in this series, stood up," Dravid said. "Yashasvi Jasiwal in the fourth game, I thought he played a very good innings. He's shown us what he can do in the IPL and it was nice to see him replicate that in international cricket.

"Tilak Varma, I thought, was really good, to come in in in the middle order. He came in sometimes in very difficult situations. But every time, he plays with a lot of intent, plays very positively, looks to move the game along, fielded brilliantly throughout the series, showed us he can bowl one or two overs as well. So really positive signs from Tilak and to have that left-hander in the middle order does make a huge difference against some of the attacks that we've been playing against.

"Mukesh as well. He debuted in all the formats in this series and I thought he acquitted himself really well. His ability to bowl at the death, sometimes he was called upon to bowl against some really big powerful hard hitters and he acquitted himself well for someone who was just playing his fourth or fifth game. So I think there's some real good positives in the guys who made their debuts for us and hopefully they take confidence from the series and keep learning as they go forward. They'll be going to Ireland and get a few more opportunities in the T20 format and I'm sure the more opportunities they get, they better they'll be."