Terry Alderman
Ex-Australia seam bowler on BBC Test Match Special

"Smith has faced about 15 deliveries. He's played one good shot and 14 bad ones."

Image source, AP

Smith is looking to pull with all the alacrity of a teenager in a nightclub. He can't get it off the square at the moment though, with a smattering of late movement from Shami perhaps the cause of his travails.

These two haven't rotated the strike especially well so far in this tournament and that problem continues as Smith's all-or-nothing approach yields nothing more than mistimed hoicks and fresh-air shots. A maiden.

Oooh, Dwayne. Jittery start from Smith as the Windies batsmen mistimes his second pull shot of the day, then slashes recklessly at a wide one. This Windies pair won't die wondering. Just one run off a tidy first over from Umesh Yadav as Smith works him to leg.

Terry Alderman
Ex-Australia seam bowler on BBC Test Match Special

"Every single Indian fielder out there went up here. It might have just brushed his pad. The bat looks to have just touched the pad on the way through. It was a beauty of a delivery."

Windies opener Dwayne Smith only averages 19 in his ODI career, but you still can't bowl short and wide to him. He cuts hard and late through point for four, the first runs of the innings.

Now then, plenty of excitement amongst the Indian fielders as Shami serves up a snorter to Gayle first ball, but there's no edge there. Gayle, it would be fair to say, can be a little vulnerable early on his innings.

Right, West Indies' flannelled knights are ready, and so are India's fielders. Mohammed Shami has the new ball. Let's play!

Ebony Rainford-Brent
Ex-England batter on BBC Test Match Special

"It is a good move for West Indies bringing Kemar Roach in as he has extra pace. If Jerome Taylor can be backed up on this wicket they will hope they can nip out a few. For India it is exactly the team I would have expected as they have been in good form."

Time for the anthems, beginning with my personal favourite, 'Rally Round the West Indies'. Sample lyric: "Through our flannelled knights/Flashing their willow and leather/These keepers of our flame must feel our undying love." Outstanding.

Plenty of Indian fans in the 25,000-seater WACA stadium making a racket as their national anthem is played.

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It's been an up-and-down tournament for West Indies, who have two wins and two losses on the card so far.

Last week the rollercoaster reached another low point with a 257-run mauling by South Africa.

But West Indies captain Jason Holder says the team won't change the way they play.

"We're going to be aggressive," he said. "We're going to play our normal style of cricket. We obviously have areas to improve on in terms of our bowling. Once we do that, we're still a force to be reckoned with in this competition."

The performance of these two sides so far can be encapsulated in their pace bowling. A traditional strong suit of the West Indies and a weak point for India, but in this tournament, the roles have been completely reversed.

India's seamers looked docile in the tri-series with Australia and England, but the likes of Mohammed Shami and Umesh Yadav have been reborn in this tournament, and in their three matches India have conceded miserly totals of 224, 177 and 102.

Meanwhile, West Indies' bowlers have struggled, failing to defend 304 against Ireland and conceding a mammoth 408 against South Africa. Kemar Roach, who returns to the side today, has been going at eight an over...

This game will be the first time the sides have met since West Indies pulled out of their tour of India in October because of a pay dispute.

The Windies returned home early with a one-day international, a Twenty20 and three Tests still to play.

The after-effects are still being felt, with Dwayne Bravo and Kieron Pollard left out of the World Cup squad because of what the West Indies Cricket Board saw as their influence in their withdrawal. Chris Gayle then accused the board of victimisation.

To add spice to matters, the Board of Control for Cricket in India has demanded $42m from the WICB for lost earnings.

Image source, BBC Sport

Here's how the group table looks. India are top of the pops and as well as qualifying for the next stage if they win this match, they will have every chance of finishing top of the group - with only games against Ireland and Zimbabwe to come.

West Indies have had a mixed tournament but their early defeat by Ireland means that another loss here would leave their chances of reaching the quarter-finals in the balance.

One change for each side. India bring in the fit-again Mohammed Shami for Bhuvneshwar Kumar, while West Indies replace spin with seam: Kemar Roach is in for Sulieman Benn.

India XI: Rohit Sharma, Shikhar Dhawan, Virat Kohli, Ajinkya Rahane, Suresh Raina, MS Dhoni (capt & wk), Ravindra Jadeja, R Ashwin, Mohit Sharma, Mohammed Shami, Umesh Yadav.

West Indies XI: Dwayne Smith, Chris Gayle, Marlon Samuels, Denesh Ramdin (wk), Lendl Simmons, Jonathan Carter, Darren Sammy, Andre Russell, Jason Holder (capt), Kemar Roach, Jerome Taylor.

Up goes the specially minted ICC coin, West Indies captain Jason Holder calls heads and heads it is. West Indies have won the toss and Holder says they will bat first.

Holder says it looks like a good wicket and they want to put runs on the board and defend. The Windies have scored 300 plus in every game in which they've batted first so far in the tournament.

Old poker face MS Dhoni says he's not too disappointed, and that he doesn't feel the wicket will change much. He says India may have a bit of an advantage having played in Perth before in this tournament.

Hello and welcome to our live coverage of the 2015 Cricket World Cup!

Today's game sees India take on West Indies in Perth in Pool B. India will qualify for the quarter-finals if they win; West Indies will be on the brink of advancing if they emerge victorious, but defeat would leave their hopes in real jeopardy.

The toss is coming up very shortly.

Image source, Reuters

What a curious few months it has been for India's one-day cricket team.

Rewind to last summer, and you'd struggle to find anyone who would back against them for this World Cup. Convincing winners of the last edition, they were consistently among the strongest performers in the short form of the game.

Then they arrived in Australia, and everything went wrong. Losing the Test series 2-0 was bad enough, but it was extending that winless run through the subsequent ODI tri-series that really set alarm bells ringing. Heck, they even lost to England, twice - defeats that seem worse with every game that Eoin Morgan's faintly shambolic outfit play. By the time the World Cup got underway, they hadn't won in over two months, and suddenly getting India in the office sweepstake was about as promising as inheriting a summer-house in Siberia.

But now, India are back again. They've cruised through their opening three matches of this tournament, beating fierce rivals Pakistan and hammering highly-fancied South Africa. Win today, and they'll qualify for the quarter-finals. But up against them are a team with a point of their own to prove...