Matthew Wade and Mitch Marsh will join Australia's World Cup squad as cover for injured pair Usman Khawaja and Marcus Stoinis.
Khawaja was troubled by a problem to his left hamstring in the 10-run defeat to South Africa on Saturday, a result which meant the defending champions will take on tournament hosts England at Edgbaston on Thursday.
Stoinis is also a major doubt for the semi-final as he struggles with a side complaint, an issue which sidelined the all-rounder for two group stage matches, prompting Australia to turn to Wade and Marsh.
Matthew Wade and Mitch Marsh will join Australia's World Cup squad for the semi-final match
Mitch Marsh played for Australia against England in the 2015 ICC Cricket World Cup
Both Khawaja and Stoinis will undergo scans on their injuries but, in the meantime, Wade and Marsh will leave the Australia A group currently in Sussex to link up with the 15-man World Cup squad.
A statement on the media arm of Cricket Australia's website said: 'Australia A arrived at Arundel for today's four-day clash with Sussex short two players after wicketkeeper-batter Matthew Wade and allrounder Mitch Marsh were called up as cover to Australia's World Cup squad.'
The statement continued: 'The injury setbacks to Usman Khawaja (hamstring) and Marcus Stoinis (side) suffered in Australia's dramatic loss to South Africa in Manchester has seen the selectors draft in Wade and Marsh.
Khawaja was troubled by a problem to his left hamstring in the 10-run defeat to South Africa
'They left Brighton this morning for Birmingham, the destination of Australia's blockbuster semi-final show with tournament hosts England on Thursday.
'Both Khawaja and Stoinis are set to undergo scans today before their future in the World Cup is determined, with both players still officially a part of Australia's 15-man Cup squad at this stage.
'However, it appears Khawaja's hamstring injury looks likely to rule the left-hander out for the rest of Australia's campaign.'
Marcus Stoinis missed Australia's wins over Pakistan and Sri Lanka due to a side complaint
Marsh links up with the group for a second time as cover for Stoinis, who missed Australia's wins over Pakistan and Sri Lanka before returning against Bangladesh.
Australia's 2015 World Cup-winning captain Michael Clarke reacted to the call-ups, saying: 'Great selection - Wade must play!
'He is in unbelievable form and it's the way he is batting- aggressive, intent, looking to take the bowlers on! Exactly what Australia needs to beat England in the semi final.'