David Warner and Steve Smith returned to international cricket on Saturday to see Australia through to a comfortable seven-wicket win over Afghanistan in their World Cup opener at Bristol’s County Ground.

Australia, whose captain Aaron Finch contributed 66 runs off 49 balls, reached 209 for three in the 35th over, ensuring a winning start to the defence of their World Cup crown.

Earlier, Afghanistan recovered from a disastrous start in their World Cup opener against defending champions Australia to post a brave total of 207 in Bristol.

Warner top-scored with an unbeaten 89 while Smith made 18 as Australia easily chased down a modest target after Afghanistan, who won the toss and elected to bat, were bowled out for 207.

The pair were back for their first official one day international after year-long bans following a ball-tampering scandal in South Africa.

Gulbadin Naib, captain of the rank outsiders, took the bold decision to bat in warm conditions in the southwest of England, hoping to amass a score his spin bowlers could defend on the small ground.

But the decision backfired badly, with both openers departing for ducks as Afghanistan slipped to five for two in the second over and looked on course for a humiliation.

Leg-spinner Adam Zampa broke the partnership with a beautifully flighted delivery that brought Shahidi forward and beat the batsman, with wicketkeeper Alex Carey whipping off the bails.

Steve Smith denied Shah a World Cup fifty, taking a catch at short cover off the bowling of Zampa to send him back to the pavilion for 43 off 60 balls.

Mohammad Shahzad was bowled by Mitchell Starc in the opening over of the match and Hazratullah Zazai quickly followed, caught behind by wicket-keeper Alex Carey off Pat Cummins.

With their team in deep trouble, Rahmat Shah and Hashmatullah Shahidi led a fight back for the minnows, playing in only their second World Cup, putting on a gritty 51 for the third wicket.

In the next over, former skipper Smith dived to his left to stop a drive from Mohammad Nabi, returning the ball smartly to Carey, who whipped off the bails with the batsman stranded, leaving Afghanistan struggling at 77-5.

The big hits brought the knots of Afghan supporters to their feet and a line of flag-waving fans ran along the front of one of the stands.

Zadran brought up his 50 off 46 balls with an edge over the slips off a sharp Starc bouncer. But their momentum was slowed the next ball when Naib top-edged a short delivery form Marcus Stoinis and Carey completed the catch.

Just four balls later another Stoinis short ball dismissed Zadran, with Carey again taking the catch to reduce Afghanistan to 162-7.

Rashid Khan smashed 20 in a Stoinis over to lift the spirits of the Afghan fans and another driven six off Zampa brought up the 200.

But he was lbw to the next ball and the innings ended after 38.2 overs when Mujib Ur Rahman was bowled by Cummins.

As expected, Smith and opener David Warner were both included for their first full major international match since they completed year-long bans imposed after a ball-tampering scandal in South Africa.