Mitchell Starc held his nerve at the death to guide Australia to their maiden win of the T20I Series by four runs after the West Indies almost blasted their way to victory from an improbable position on Thursday.

Chasing 189-6, the West Indies needed 57 from 24 balls with five wickets left after Mitch Marsh took two wickets in an over, before fireworks from Fabian Allen (29 from 14) and Andre Russell (22* from 13) turned the game on its head in St Lucia.

The pair combined for four sixes from five balls in the penultimate over from Riley Meredith, needing 11 off the final over but Starc sent down five dot balls to Russell in the last to earn Australia a win which makes the series 3-1.

Australia captain Aaron Finch had won the toss and elected to bat, starting strongly with the skipper making 53 from 37 balls alongside Mitch, who top scored with 75 from 44 deliveries, in a 114-run stand.

The tourists stumbled in the middle order again, losing 40-5 with Hayden Walsh taking three wickets, before some late hitting from Dan Christian and Starc lifted them to a strong total.

The West Indies flew out of the blocks in their pursuit with Lendl Simmons posting 72 from 48 before the outstanding Marsh (24-3) dismissed him, along with Nicholas Pooran in quick succession.

All seemed lost for the hosts at 132-5 but Allen and Russell offered hope, before Starc's clutch final over.

Australia bowlers Mitchell Starc, Josh Hazlewood, Pat Cummins and Nathan Lyon have called for an end to "rumour mongering and innuendo" around the 2018 ball-tampering scandal.

Then-captain Steve Smith, David Warner and Cameron Bancroft were banned by Cricket Australia after all three were implicated in a plot to alter the condition of the ball with sandpaper during a 322-run defeat to South Africa at Newlands in March 2018.

Bancroft, who was caught on camera rubbing what was initially thought to be yellow sticky tape on the ball, was punished along with Smith and Warner, the latter as vice-captain also part of Australia's "leadership group".

Head coach Darren Lehman was cleared of any wrong-doing at the time and later stepped down, while the bowling attack of Starc, Hazlewood, Cummins and Lyon were also said to be in the dark.

In an interview with The Guardian last weekend, Bancroft was asked whether the bowlers knew what was going on and replied: "Uh … yeah, look, I think, yeah, I think it's pretty probably self-explanatory."

Cricket Australia invited Bancroft to come forward with any further information after it conducted a full investigation at the time.

In a joint statement published on Starc's website, the Australian bowlers stridently denied any wrongdoing and said it was "time to move on".

"We pride ourselves on our honesty. So it’s been disappointing to see that our integrity has been questioned by some journalists and past players in recent days in regard to the Cape Town Test of 2018," the statement read.

"We have already answered questions many times on this issue, but we feel compelled to put the key facts on the record again.

"We did not know a foreign substance was taken onto the field to alter the condition of the ball until we saw the images on the big screen at Newlands."

Umpires Nigel Long and Richard Illingworth inspected the condition of the ball after Bancroft appeared to tamper with it and did not find enough damage to change it – something Starc, Hazlewood, Cummins and Lyon chose to highlight.

The statement added: "None of this excuses what happened on the field that day at Newlands. It was wrong and it should never have happened.

"We've all learned valuable lessons and we'd like to think the public can see a change for the better in terms of the way we play, the way we behave and respect the game. Our commitment to improving as people and players will continue.

"We respectfully request an end to the rumour-mongering and innuendo. It has gone on too long and it is time to move on."

India retained the Border-Gavaskar Trophy after an enthralling three-wicket win over Australia in the final Test in Brisbane.

Led by Shubman Gill (91), Rishabh Pant (89 not out) and Cheteshwar Pujara (56), India incredibly passed their target of 328 late on day five on Tuesday.

It wrapped up a 2-1 series victory and ended Australia's stellar record at the Gabba, where they were unbeaten in their previous 31 Tests.

Pat Cummins (4-55) was the pick of Australia's bowlers, but India managed the third highest successful chase in their history and highest at the Gabba.

Rohit Sharma (7) fell early after edging Cummins behind, but Gill and Pujara blunted the Australia attack with a 114-run partnership.

Gill was the aggressor, while Pujara survived a tight lbw review off Nathan Lyon (2-85) when on just two.

Lyon had Gill caught by Steve Smith at first slip before Cummins removed Ajinkya Rahane following the captain's 22-ball 24.

The second new ball brought a much-needed breakthrough for Australia as Cummins finally got Pujara lbw, but Pant continued to impress.

As the dangerous Pant passed 50, Mayank Agarwal (9) survived following a review for a caught behind, but he scooped Cummins to Matthew Wade at short cover the following ball.

Washington Sundar (22 off 29) came and went, but Pant saw India to a remarkable win.

Pant times his run to perfection

His wicketkeeping often questioned, Pant produced the match-winning innings on the final day – and he timed it to perfection.

Just three overs were left when India wrapped up their victory, Pant perfectly choosing when to attack and keeping his composure as late wickets fell to lead India to a famous win.

Pujara highlights India bravery

Pujara's innings was just another example of India's fight throughout the series. The right-hander faced 211 balls in the second innings and he was hit repeatedly, including on the hand and in the head, but continued to battle on.

India were struck hard by injuries and saw Virat Kohli return home for the birth of his first child following the opening Test, which they lost after being dismissed for 36. Rahane stepped up in Melbourne and they managed to frustrate Australia in Sydney before a stunning victory in Brisbane.

Starc's struggles hurt Australia

Seemingly dealing with a hamstring injury on the final day, Mitchell Starc's struggles continued as he finished with figures of 0-75.

The left-arm paceman was particularly expensive and barely troubled India, who managed to contain him throughout the series. Starc finished with 11 wickets at 40.72 for the series, while the tourists also had answers to Lyon (nine wickets at 55.11).