Usman Khawaja has avoided serious injury after being struck by an Andre Russell delivery in Australia's seven-wicket win over the West Indies in Southampton.

Key points: Australia has continued preparations for the upcoming Cricket World Cup with a seven-wicket win over West Indies

Australia has continued preparations for the upcoming Cricket World Cup with a seven-wicket win over West Indies The Australians had an injury scare after Usman Khawaja was hit by a bouncer from West Indian all-rounder Andre Russell

The Australians had an injury scare after Usman Khawaja was hit by a bouncer from West Indian all-rounder Andre Russell Batting as an opener — with David Warner coming in at three — Khawaja retired hurt for 5 before doctors cleared him of jaw damage

Khawaja was forced off the field early in his innings in the World Cup warm-up match on Wednesday, after being hit by a ball that reared off a length and caught him under the grill on his helmet.

The Australian was immediately surrounded by the West Indies fielders and his former Sydney Thunder teammate Russell, before being led from the field by team doctor Richard Saw.

Subsequent hospital scans luckily failed to show any serious injury to the 32-year-old.

The Queensland batsman — who had made just five when forced off the ground — has been in imperious form in the series wins against India and Pakistan and the news is a huge relief for the world champions, who open their campaign against Afghanistan on June 1.

Khawaja (second from right) was surrounded by players before being led from the field by the team doctor. ( AP/PA: Andrew Matthews )

"It was very scary," said batsman Shaun Marsh, who scored an unbeaten 55 and is vying with Khawaja for a starting spot when Australia face Afghanistan.

"It copped him on the side of the cheekbone … the main thing is he is OK and can bounce back pretty quickly.

"He was a bit shaken, as you are when you get hit on the head, but he is a tough cookie Uzzy and he'll be ready to go."

Khawaja was preferred at the top of the order to David Warner, who batted at three, for the warm-up match.

Smith in form as Aussies beat West Indies

Away from Khawaja's incident, former skipper Steve Smith scored 76 in Australia's win.

Smith and Shaun Marsh (55 not out) put on 109 for the third wicket in the unofficial practice match on the nursery field in Southampton.

Smith hit seven fours and two sixes from 82 balls before falling to the spin of Carlos Brathwaite, but it was his third successive half-century that impressed on the back of the two he chalked up in the recent practice matches against New Zealand.

The 29-year-old looked at ease against a lively West Indies pace attack in what is a hugely encouraging sign for the world champions, who face England in an official warm-up game on Saturday.

Smith impressed with his innings of 76 off 82 balls ahead of Australia's first World Cup game on June 1. ( AP/PA: Andrew Matthews )

"He has gone fantastically since he come back in," Marsh said.

"It's good to see him score some runs, no doubt he's ready for a big tournament.

"He has come back and scored some runs … just like he always does."

Marsh looked equally comfortable at the crease and continued from where he left off 12 months ago when he scored two centuries in the ODI series against England.

The West Australian hit the winning runs as Aaron Finch's side eased to their target of 230 with 11.4 overs to spare and said he feels comfortable batting in English conditions.

"It gives you confidence knowing you have scored runs over here in the past," he said.

"It's just nice to spend some time out in the middle and get my feet moving.

"It's a different challenge to back home as it swings around a bit, but it's a good challenge."

Warner came to the crease after Khawaja's exit and he got off the mark in splendid style, pulling Russell to the boundary with the first ball he faced.

The impressive Oshane Thomas caused plenty of uncomfortable moments for Warner and Finch (42) on a lively deck.

The giant quickly dismissed Warner for 12 with a brutish ball that he gloved to Nicholas Pooran behind the stumps.

Finch then departed when he slapped Floyd Reifer to his West Indies counterpart Jason Holder at mid-on.

Smith, who hit his first ball for six over long-on, then took charge along with Marsh to lay the foundations for victory.

His dismissal came as something of a surprise, when Pooran got his hand to the thinnest of edges, allowing Glenn Maxwell (18 not out) to see the team over the line.

Earlier, Australia's bowlers dismissed West Indies for 229.

Pacemen Pat Cummins, Nathan Coulter-Nile and Mitchell Starc grabbed two wickets apiece with Maxwell also taking a pair in just three overs.

Leg-spinner Adam Zampa bowled superbly to finish with 1-42 from nine overs to boost his hopes of starting against Afghanistan in the tournament opener on June 1 in Bristol.

AAP