Kane Richardson

Fast bowler Richardson played once in the 2021 edition, taking 1-29 from three overs in Bangalore's 10-wicket win over Rajasthan Royals on April 22.

Leg-spinner Zampa, however, did not feature for the Royal Challengers, who confirmed the departure of the duo for personal reasons.

"Adam Zampa and Kane Richardson are returning to Australia for personal reasons and will be unavailable for the remainder of #IPL2021. Royal Challengers Bangalore management respects their decision and offers them complete support," a statement on Twitter read.

Andrew Tye had become the first Australian to depart the IPL bubble on Sunday, a decision made by the Rajasthan Royals fast bowler over concerns about flights home amid a rise in COVID-19 cases in India.

The country has been setting global records for daily figures, with over 17million confirmed cases in total during the pandemic.

"I just thought I should try and get on the front foot and get home before I got locked out of the country," Tye told radio station SEN while in Doha awaiting to complete his journey to Australia.

"There's definitely concerns. A lot of guys have been in touch once they've realised I was leaving. Some of the guys are very interested in what route I took home and how I approached it."

A three-day snap lockdown was placed on the Perth and Peel areas of Western Australia last week amid concerns over coronavirus spreading within communities.

Ashwin, meanwhile, is leaving the Delhi Capitals squad to focus on helping his family during the coronavirus crisis.

"I would be taking a break from this year's IPL from tomorrow," he tweeted on Sunday. "My family and extended family are putting up a fight against COVID-19 and I want to support them during these tough times. I expect to return to play if things go in the right direction. Thank you."

Ashwin has taken one wicket and posted an economy rate of 7.73 runs per over in his five outings for the Capitals, who defeated Sunrisers Hyderabad on Sunday to make it four wins in five outings.

Richardson reported a mild sore throat on Thursday and is being quarantined as he awaits the results of his coronavirus test.

The 29-year-old was part of the Australia limited-overs squads that played in South Africa in February and March.

"Our medical staff are treating this as a typical throat infection but we are following Australian Government protocols that require us to keep Kane away from other members of the squad and perform the appropriate tests given he has returned from international travel in the last 14 days," a Cricket Australia spokesperson said, via cricket.com.au.

"Once we receive the results of the tests and Kane recovers in the next few days we expect he will re-join the team.

"We will not be making further comment until something changes."

Sean Abbott has joined the Australia squad as cover.

The three-match ODI series, which begins in Sydney on Friday, will be played behind closed doors due to the coronavirus.

Richardson aggravated the injury during a training session in Melbourne before Australia fly out to Lahore.

A Cricket Australia statement said: "Although the injury is considered minor it was decided the long trip to Pakistan along with four games in eight days and short turnarounds [that] it was in Richardson's best interests to remain home."

Left-arm seamer Dwarshuis, 27, will be hoping to make his international debut in the absence of Richardson.

Test captain Pat Cummins, Mitchell Starc and Josh Hazlewood have been rested for the white-ball contests with Pakistan.

The three-match ODI series starts in Lahore next Tuesday, with a T20 international to come on April 5.